Frozen Cut Onions
Description
Technical Parameters
IQF Onion Supply for Food Manufacturing, Foodservice and Private Label
Frozen Cut Onions with Defined Cut Size, Defect Limits and Batch Documentation
We supply IQF frozen cut onions in white, yellow and red onion programs for importers, frozen-food distributors, sauce and soup processors, ready-meal factories, central kitchens, foodservice operators and retail frozen brands. Our main commercial formats include diced onions, sliced onions, strips and larger cuts, prepared to an agreed size, color, defect and packing specification.
A usable quotation needs more than the words "frozen onion." We confirm onion type, cut dimensions, size tolerance, raw or blanched processing, soluble solids, pungency requirement, free-flowing condition, defect limits, microbiological criteria, inner bag, carton configuration, destination market and required reports. These details become the repeat-order standard and the basis for batch inspection.
Frozen diced white onion shows the individual pieces, natural pale color and portion-ready form used for industrial dosing.
What We Confirm Before Quotation
Start with the final product and process. A 4×4 mm dice for a sauce behaves differently from a 20×20 mm cut for a ready meal. A thin slice used in pizza or prepared dishes requires a different length and thickness check from 10×10 mm dice used in soup, filling or vegetable blends.
- Onion: white, yellow or red onion; crop origin and season by program.
- Cut: dice, slice, strip, ring, chopped or larger piece.
- Process: raw IQF or blanched IQF when required by the application.
- Quality: size distribution, color, clumps, peel, root, core, blemishes and foreign material.
- Performance: free-flowing condition, aroma, soluble solids, pungency and water release.
- Supply: pack format, MOQ, label, reports, shipment schedule and destination port.
Procurement Risks and Our Control Points
We translate common sourcing problems into measurable order terms. The agreed specification, inspection record and batch files give your purchasing and QA teams a consistent reference for approval and repeat orders.
| Concern | Order Risk | Our Control | Commercial Result |
|---|---|---|---|
| Uneven cut | Irregular dosing, cooking and visual distribution | We name the nominal dimensions, oversize definition, undersize rule and sampling method. | Repeatable cut-size acceptance. |
| Clumping and frost | Difficult weighing, block formation and excess water release | We inspect draining, IQF condition, clumps, surface ice and pack temperature. | Free-flowing product within the agreed tolerance. |
| Peel, roots and dark pieces | Visible defects in sauces, fillings, meals and retail bags | We separate peel, root/core material, blemishes, color variants and extraneous vegetable matter. | A defect schedule that can be counted and recorded. |
| Weak onion character | Insufficient aroma or sweetness in the finished formula | We review onion type, crop, soluble solids and pyruvic-acid target when these parameters matter. | Application-matched flavor profile. |
| Incomplete QA files | Delayed supplier approval or import review | We prepare the product specification, batch COA and agreed supporting reports with shipment documents. | A defined document package linked to the lot. |
| Packing or label mismatch | Repacking cost, artwork delay or retail non-compliance | We review bag weight, film, seal, barcode, language, carton marks, pallet and loading plan before production. | Order-specific bulk, foodservice or private-label packing. |
Onion Types and Cut Formats
We match color, aroma, pungency, piece size and pack format to the finished application. Availability of each crop, cut and pretreatment is scheduled by the assigned production program.
Diced Onion
4×4, 6×6, 10×10 and 20×20 mm. The 10×10 mm format is the main general-purpose specification for sauces, soup, fillings, ready meals and vegetable blends.
Sliced Onion
Typical slice thicknesses are 2–4, 4–6 and 6–8 mm. Slice arc, length distribution and broken-piece tolerance are set for the chosen application.
Strips and Larger Cuts
5–7 mm-wide strips and 20×20 mm pieces are available for visible vegetable identity in foodservice, meal kits, pizza, prepared dishes and further processing.
White, Yellow and Red
White and yellow programs suit pale sauces and broad savory use. Red onion adds purple-red visual identity. We keep the onion type on the specification and carton mark.
White onion strips show the curved slice form and pale color used for visible onion applications.
The red onion dice image includes a caliper for cut-size reference; final acceptance follows the written sampling method.
Application Matching by Cut and Performance
We use the final process to select the cut rather than treating every onion format as interchangeable. Your trial should use the actual mixing, heating, filling and holding conditions used in production.
Sauces, Soups and Seasoning Bases
Choose 4×4 or 6×6 mm dice when rapid distribution and less visible onion identity are required. Soluble solids, aroma and water release can be included in the trial protocol.
Ready Meals and Fillings
Use 6×6 or 10×10 mm dice for controlled distribution in dumpling, pastry, meat, vegetable or prepared-meal fillings. Size uniformity and free-flowing condition support dosing.
Pizza, Foodservice and Visible Toppings
Sliced onions or 5–7 mm strips provide visible shape. We align slice thickness, broken-piece tolerance and packing size with portioning and menu throughput.
Vegetable Blends and Meal Kits
Match the onion dimensions to the other components so the blend remains visually balanced. We review formula ratio, cut compatibility, pack weight and mixed-product documents.
Retail Frozen Packs
10×10 mm dice, slices or strips can be packed in clear or printed bags. We review artwork, ingredient declaration, storage statement, net weight, barcode and outer-carton marks.
Further Processing
Industrial users can define raw or blanched IQF material, pungency, Brix, dice distribution and microbiological criteria for downstream cooking, blending or formulation.
Commercial Product Specification
The values below form a detailed quotation baseline. The signed specification and purchase order define the final contract. Crop-sensitive values such as Brix and pyruvic acid are set as order ranges, while the COA records the actual result measured for the corresponding production batch.
| Field | Quotation Baseline |
|---|---|
| Product | IQF Frozen Cut Onions / Frozen Diced Onions / Frozen Sliced Onions |
| Botanical name | Allium cepa L. |
| Onion type | White, yellow or red onion; one type per defined lot unless a blend is ordered. |
| Origin and crop | Fujian, China program; main source-page season February–June. Alternative crop bases are stated in the quotation when used. |
| Main cut sizes | Dice: 4×4, 6×6, 10×10 or 20×20 mm. Slice thickness: 2–4, 4–6 or 6–8 mm. Strips: 5–7 mm width. Larger cut: 20×20 mm. |
| Processing | Selected, peeled, washed, cut, drained, IQF frozen, graded, inspected, metal detected and packed. Raw IQF or blanched IQF is named on the order. |
| Ingredient | 100% onion for the plain product. Any processing aid or additive must be declared in the approved formula and label. |
| Appearance | Characteristic white, pale yellow or purple-red color; practically free flowing; clean cut; no abnormal frost, thawing, fermentation or off-odor. |
| Soluble solids | Typical quotation range 7.0–12.0 °Bx. The target is selected by onion type, crop and finished application. |
| Pyruvic acid / pungency | Typical project range 3.0–10.0 µmol/g fresh weight. The method, target and batch reporting requirement are stated in the approved specification. |
| Free-flowing condition | Pieces separate readily under normal frozen handling; clumps controlled by the agreed defect schedule. |
| Bulk packing | 1×10 kg food-grade blue PE liner/carton; 10×1 kg or 4×2.5 kg/carton. |
| Retail packing | 300 g, 500 g, 900 g, 1 kg or 20×500 g/carton; transparent, colored or printed private-label bag. |
| MOQ | 10 metric tons for a standard bulk program. Retail, special cut and mixed-SKU plans depend on film, artwork and production schedule. |
| Loading reference | 20RF: approximately 10–12 MT. 40RH: approximately 22–25 MT. Exact quantity depends on carton dimensions, pallet use and legal payload. |
| Shelf life and storage | 24 months from production when continuously stored and transported at −18°C or below. |
| Lead time | Normally 20–30 days after specification, packing, artwork and order confirmation; crop and shipping schedule apply. |
| Loading port | Xiamen or another named China port according to the assigned plant and shipment plan. |
| Trade terms | FOB, CFR/CNF or CIF; payment terms stated in the sales contract. |
| Certificate support | HACCP, ISO, BRCGS, Kosher, Halal or organic-related documentation only according to the selected facility, product scope, destination market and order agreement. |
10×10 mm Diced Onion Defect Schedule
For a detailed commercial starting point, we use a defined sample, defect name and unit. The baseline below reflects a 10×10 mm diced-onion specification. Different cuts require a revised oversize definition and sampling plan. The approved purchase specification takes precedence.
| Defect | Definition / Method | Quotation Limit |
|---|---|---|
| Foreign matter | Material not derived from onion, including stone, glass, metal, plastic, wood or insects. | Nil in 1,000 g |
| Foreign vegetable matter | Plant material not derived from the onion plant. | Nil in 1,000 g |
| Onion extraneous vegetable matter | Brown scale leaves or other onion-plant material outside the bulb. | ≤4 pieces/1,000 g |
| Clumps | Dices welded together and not readily separated without damaging the pieces. | ≤100 g/1,000 g |
| Major blemishes | Black or brown area equivalent to a circle ≥6 mm on one dice. | ≤10 pieces/250 g |
| Total blemishes | Major plus minor blemishes; minor is a black/brown area from 2 mm to <6 mm. | ≤30 pieces/250 g |
| Color variants | Conspicuously grey, deep yellow, deep green or purple pieces outside the named onion type. | ≤12.5 g/250 g |
| Fibrous roots or tough stems | Pieces with attached tough stem or fibrous root material. | ≤10 pieces/250 g |
| Oversize | For nominal 10×10 mm dice, pieces measured above 15 mm. | ≤12.5 g/250 g |
USDA grade terminology also separates color, blemishes, peel, core material, character and extraneous vegetable material. We can align the final inspection plan with USDA Grade A terminology or a named customer standard when requested.
How We Prepare IQF Frozen Cut Onions
- Raw material selection: We receive sound, mature bulbs and remove decay, mold, severe bruising, sprouts and abnormal material.
- Peeling and trimming: We remove dry skin, neck, root plate and visibly defective tissue to the agreed standard.
- Washing: We wash the peeled onions and manage clean handling before cutting.
- Cutting and grading: We set the cutting equipment for the named dice, slice or strip dimensions and inspect size distribution.
- Pretreatment: Raw IQF is the default only when named; blanching is applied when the approved product specification requires it.
- Draining and IQF freezing: We control surface water and freeze pieces individually to maintain a free-flowing condition.
- Final sorting: We inspect color, peel, root/core material, blemishes, oversize pieces, clumps and foreign material.
- Metal detection, packing and storage: We metal detect, check weight and seal, identify the lot and transfer cartons to frozen storage at −18°C or below.
The washing line shows peeled white onions moving through water cleaning before cutting; it is direct onion-processing evidence.
Manual red onion sorting and trimming supports removal of skin, roots and visible defects before cutting and freezing.
Color, Texture and Flavor Control
Onion crop, variety, maturity and storage history change the finished ingredient. We therefore separate visual defects from flavor-related parameters. Color inspection covers pale, grey, deep-green, oxidized or abnormal pieces. Character inspection covers tough, fibrous, soft or spongy material.
Soluble solids expressed as °Brix provide a practical crop and sweetness indicator. Pyruvic acid, reported in µmol/g fresh weight under a named method, provides a pungency reference. These are not fixed universal quality scores: the suitable range depends on whether the onion is intended for a mild sauce, a visible savory topping, a cooked filling or a strong onion base.
For projects where water release affects a filling, sauce viscosity or frozen meal, we can add a defined thaw or cook test. The test method must name sample weight, time, temperature and result calculation so repeat batches are compared on the same basis.
Microbiological and Contaminant Criteria
Frozen cut onions are normally supplied as a ready-to-cook ingredient, not represented as ready to eat. The baseline below is deliberately clear so quotation, testing and COA review use the same units. Destination-market law and a stricter signed customer standard override this baseline.
| Parameter | Order Limit | COA Reporting |
|---|---|---|
| Aerobic plate count | ≤100,000 CFU/g | Actual result for the batch |
| Enterobacteriaceae | ≤1,000 CFU/g | Actual result for the batch |
| E. coli | <10 CFU/g | Actual result or below reporting limit |
| Yeasts and moulds | ≤1,000 CFU/g | Actual result for the batch |
| Salmonella | Absent in 25 g | Detected / not detected |
| Listeria monocytogenes | Absent in 25 g for this quotation baseline | Detected / not detected |
| Lead (Pb), EU reference | ≤0.10 mg/kg wet weight for bulb vegetables | Actual result when included in the lot test |
| Cadmium (Cd), EU reference | ≤0.030 mg/kg wet weight for bulb vegetables other than garlic | Actual result when included in the lot test |
| Pesticide residues | Within the destination-market MRLs for the named onion and market | Analyte-by-analyte actual result on the agreed report |
COA Structure: Specification Limit and Actual Batch Result
We do not prefill a COA with target values. The specification column states the agreed acceptance limit; the actual-result column records the value measured for the corresponding production batch. The document also identifies product, cut, lot, production date, best-before date and test method or laboratory reference.
| COA Item | Specification | Actual Result |
|---|---|---|
| Cut size | 10×10 mm; oversize >15 mm ≤12.5 g/250 g | Measured weight and conformity for the lot |
| Brix | Example order range 7.0–12.0 °Bx | Batch refractometer result |
| Pyruvic acid | Example project range 3.0–10.0 µmol/g FW | Batch result under the named method |
| Defects | Clumps, blemishes, color variants, peel/root and EVM limits | Count or weight found in the stated sample |
| Microbiology | Agreed CFU/g and absent-in-25-g limits | Corresponding batch laboratory results |
| Contaminants | Named market limit and analyte list | Actual Pb, Cd and/or pesticide results when ordered |
Certificates, Documents and Traceability
We review certificate scope against the selected production facility and the ordered product. A general certificate list is not treated as proof that every certificate applies to every onion lot. For certified organic, Kosher, Halal or destination-specific programs, the relevant certificate, crop availability and label claim must be included in the order review.
Standard commercial files: product specification, commercial invoice, packing list, bill-of-lading data and batch COA.
QA support by agreement: microbiological report, pesticide-residue report, heavy-metal report, allergen/GMO statements, certificate copies and pre-shipment inspection records.
Traceability link: raw-material receipt, production date, line or shift, packing lot, cold-store movement and shipment record are connected to the lot code used on bags and cartons.
This is a general facility certificate display. It supports document review only and is not presented as a batch-specific frozen onion certificate.
Bulk, Foodservice and Private-Label Packing
The same onion cut can require different protection, labeling and loading plans by channel. We define the inner pack, outer carton and shipment configuration together so the pack works through frozen storage, handling and destination distribution.
Industrial Bulk
1×10 kg blue food-grade liner in an export carton. Confirm liner thickness, seal or tie, net weight, carton strength and pallet requirement.
Foodservice
10×1 kg or 4×2.5 kg bags per carton for portion control. Confirm bag closure, carton dimensions, date format and handling marks.
Retail and OEM
300 g, 500 g, 900 g or 1 kg bags. We review artwork, barcode, ingredient line, nutrition panel source, origin, storage statement, cooking/handling text and label language.
Mixed Container
Frozen onion can be planned with compatible frozen products when SKU MOQ, carton dimensions, plant schedule, documentation and loading sequence are workable.
General frozen-food cold storage supports the −18°C-or-below warehousing requirement; it is not described as an onion-only cold room.
General loading evidence shows carton handling, temperature checking and reefer preparation for frozen-food export.
Cold Chain and Shipment Planning
We keep finished cartons in frozen storage at −18°C or below and plan reefer loading around the confirmed packing and pallet configuration. Before shipment, the team reviews carton condition, lot marks, quantity, frozen product condition, container status and the temperature requirement stated in the shipping instruction.
The loading quantity is a planning reference, not a guaranteed payload. A floor-loaded 10 kg carton plan can use container space differently from retail packs or palletized cargo. We calculate the final carton count after bag size, carton dimensions, pallet need, container type and local payload restrictions are known.
Repeated thawing and refreezing can increase clumping, ice formation and texture loss. We therefore align production release, cold-store transfer, container booking and loading window to maintain a continuous frozen chain.
Frozen Cut Onion FAQ
1. What are frozen cut onions?
They are peeled onions cut into a named dice, slice, strip or other shape and frozen for commercial supply. We use IQF processing for a free-flowing product that can be weighed, blended and portioned while frozen.
2. Which onion colors can you supply?
We review white, yellow and red onion programs. The selected type, origin, crop window, cut, processing and color standard are stated on the quotation and product specification.
3. What frozen diced onion sizes are available?
Commercial options include 4×4, 6×6, 10×10 and 20×20 mm. The 10×10 mm dice is the main baseline on this offer; other dimensions require their own size tolerance and defect plan.
4. Can you provide frozen sliced onions and onion strips?
Yes. Typical slice thicknesses are 2–4, 4–6 and 6–8 mm, while strips can be prepared at 5–7 mm width. Send the target application and acceptable broken-piece level with the inquiry.
5. Are the onions raw or blanched before freezing?
Both product concepts exist, but they are not interchangeable. We state raw IQF or blanched IQF on the approved specification and match it to the finished process, microbiological plan and texture target.
6. How is cut-size consistency checked?
We define the nominal cut, sampling weight, oversize threshold and acceptable distribution. For the 10×10 mm baseline, pieces above 15 mm are treated as oversize and weighed in a 250 g sample.
7. Which physical defects are inspected?
The detailed schedule separates foreign matter, foreign vegetable matter, onion EVM, clumps, major and total blemishes, color variants, fibrous roots, tough stems and oversize pieces. Each item has a count or weight limit.
8. Can Brix and onion pungency be specified?
Yes. A typical sourcing range is 7.0–12.0 °Bx, while pyruvic acid can be set within a project range such as 3.0–10.0 µmol/g fresh weight. We state the method and report the actual batch result when these parameters are ordered.
9. What microbiological limits are used?
Our detailed quotation baseline lists APC, Enterobacteriaceae, E. coli, yeasts and moulds, Salmonella and Listeria monocytogenes with units. We revise the plan when destination rules or a signed customer standard require different criteria.
10. What bulk and foodservice packing is available?
Common formats are 1×10 kg, 10×1 kg and 4×2.5 kg per carton. We confirm liner or bag material, net weight, seal, carton dimensions, marks, pallet plan and loading quantity.
11. Can you prepare private-label frozen onion bags?
We review 300 g, 500 g, 900 g and 1 kg retail bags, subject to film and printing MOQ. Artwork review covers product name, ingredient, origin, storage, net weight, barcode, date coding, label language and carton marks.
12. What is the MOQ and normal lead time?
The standard bulk MOQ is 10 metric tons. Normal lead time is 20–30 days after specification, packing, artwork and order confirmation, subject to crop, production and vessel schedule.
13. Which documents can accompany the shipment?
We provide the agreed product specification, batch COA, invoice and packing list. Microbiological, pesticide-residue, heavy-metal, certificate, traceability and pre-shipment files are prepared according to the destination market and order agreement.
14. Can frozen cut onions ship in a mixed container?
A mixed frozen container can be planned when each SKU meets its MOQ and the production, carton, document and loading conditions are compatible. Send the full SKU list, pack, quantity and destination port for calculation.
Send a Complete Frozen Cut Onion RFQ
For a quotation that can move directly into sample and specification review, send the following information:
- white, yellow or red onion
- dice, slice, strip or other cut and dimensions
- raw IQF or blanched IQF
- Brix, pyruvic acid, defect or microbiological target
- bulk, foodservice or retail pack
- order quantity and mixed-SKU plan
- application and trial requirement
- destination country and port
- private-label artwork and pallet need
- required certificates, reports and target delivery
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