Food Allergen Management in Kitchens: A Practical Guide to Preventing Cross-Contact

For a guest with a food allergy, a mistake in your kitchen can be life-threatening. For your business, it can mean serious harm, loss of trust and legal consequences. Allergen management is a core part of any food safety system. This guide explains the main allergens, the controls that prevent cross-contact, and how to train your team. To build allergens into a certified system, see our ISO 22000 and HACCP services.

Handwritten ingredient cards on a table, representing food allergen management

Why allergens need special attention

Food allergens are proteins that trigger an abnormal immune response in sensitive people. Reactions can range from mild symptoms to anaphylaxis. Unlike many microbiological hazards, cooking does not destroy most allergens, and very small amounts can be enough to cause a reaction. That is why allergen control relies on prevention: knowing what is in each dish, preventing unintended transfer, and communicating clearly.

The main allergens

Different countries maintain their own lists, so confirm the requirements that apply to your market. A widely used reference is the list of 14 allergens that must be declared in the European Union: cereals containing gluten, crustaceans, eggs, fish, peanuts, soybeans, milk, tree nuts, celery, mustard, sesame, sulphur dioxide and sulphites above 10 mg/kg, lupin and molluscs. The Codex Alimentarius lists a shorter set of priority allergens, and national rules, including those applying through Gulf standards, may differ. Check the current requirements of the authorities in your emirate and for any export market.

Cross-contact versus cross-contamination

Cross-contamination usually refers to the transfer of microorganisms. Cross-contact is the unintentional transfer of an allergen from one food to another. A knife used to cut a nut-containing dessert and then used on a nut-free dish, or fryer oil shared between battered fish and chips, are typical examples. Washing does not always remove allergens, and sometimes dedicated equipment is the only reliable control.

Step 1: Know what is in every dish

Create an allergen matrix: a table listing each dish and ingredient against each allergen. Build it from supplier specifications, not from assumptions. Re-check whenever a supplier, recipe or brand changes, because substitutions are a frequent cause of incidents. Keep the matrix current and make it accessible to front-of-house staff.

Step 2: Control suppliers and receiving

Require specifications that list allergens and "may contain" statements.
Agree that suppliers must notify you of recipe or process changes.
Check labels at receiving and store allergen ingredients in sealed, labelled containers, below ready-to-eat food on shelves to prevent spills.

Step 3: Prevent cross-contact during preparation

Separate: use dedicated, colour-coded utensils, boards and containers for major allergens where practical.
Schedule: prepare allergen-free dishes first, on cleaned surfaces, before allergen-containing items.
Clean: use effective cleaning (detergent and water, then rinse), as wiping or sanitiser alone may not remove allergen proteins. Validate cleaning for critical equipment.
Segregate cooking: avoid sharing fryer oil, grills and pans between allergen and allergen-free items.
Handle rework carefully: do not add leftover product that contains an allergen into a product that does not.
Hygiene: handwashing and clean aprons between tasks.

Step 4: Label and communicate clearly

For packaged products, labels must declare allergens according to the rules that apply in the destination market, and the label must match the actual recipe. For restaurants and catering, make sure menus or staff can accurately tell guests about allergens, and give staff a clear procedure when a guest declares an allergy: record the request, inform the kitchen, and have a senior person check the plate before it goes out. Avoid vague statements such as "may contain everything" because they reduce trust and are not a substitute for controls.

Step 5: Train and verify

Every food handler, including temporary and agency staff, should be able to name the allergens, explain cross-contact, and follow your procedures. Refresher training should follow any incident or recipe change. Verify controls by observing practice, checking records and reviewing near misses. Internal audits should test whether staff actually follow the allergen procedures, not just whether the document exists.

Step 6: Prepare for emergencies

Staff should know the signs of an allergic reaction and the immediate steps: call emergency services, keep the person comfortable, and follow first-aid guidance. Record the incident, investigate the cause and take corrective action. A recall procedure must also cover allergen mislabelling, which is a common reason for recalls.

Where allergens fit in HACCP and ISO 22000

In a HACCP study, allergens are treated as a chemical hazard to be assessed at each step. Controls such as supplier approval, segregation, scheduling, cleaning and labelling are usually managed through prerequisite programmes or operational prerequisite programmes, and in some products labelling or verification may be a critical control point. ISO 22000:2018 expects you to identify the allergens relevant to your products, control them and communicate with customers about them. For how this is audited, see our guide to preparing for Stage 1 and Stage 2 audits.

Allergen control checklist

Current allergen matrix based on supplier information
Supplier change-notification agreements
Segregated storage and labelled containers
Dedicated or validated-clean equipment for major allergens
Written procedure for guest allergy requests
Training and refresher records for all staff
Label review process before any recipe change
Incident response and recall procedure

Prioritising controls works much like the hierarchy used in workplace safety; see the hierarchy of controls for the same logic applied to occupational risks.

Frequently Asked Questions

What are the main food allergens?

Common lists include cereals containing gluten, crustaceans, eggs, fish, peanuts, soybeans, milk, tree nuts, celery, mustard, sesame, sulphites, lupin and molluscs. Required lists vary by country, so check your market.

Does cooking destroy allergens?

Generally no. Most allergens are not removed or reliably neutralised by heat, so prevention of cross-contact is essential.

Is washing with sanitiser enough?

Not always. Allergen proteins are typically removed by effective cleaning with detergent and water, then rinse. Sanitiser alone is not a reliable allergen removal step.

Is allergen management part of HACCP?

Yes. Allergens are assessed as chemical hazards, and controls are applied through prerequisite programmes, operational prerequisites or critical control points depending on the process.

How often should allergen training be repeated?

At induction, whenever procedures or recipes change, and at regular refresher intervals set by your food safety system.

Need Help? Talk to BRSM Global

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