Allergen matrix explained

Food businesses deal with allergies and intolerances every day, and mistakes can have serious consequences. For some customers, exposure to or ingestion of even small amounts of an allergen can trigger severe reactions. This is why accurate allergen information, clear communication and consistent kitchen processes matter so much, especially during busy service when mistakes are more likely.

An allergen matrix is a structured way to record which of the UK’s 14 regulated allergens appear in each menu item, helping staff give accurate information and keep allergen management consistent across the business.

This guide explains how to build and maintain an allergen matrix, including supplier checks, cross-contamination notes, PPDS considerations and practical ways to keep information accurate as recipes and ingredients change.

The Food Standards Agency pages on food allergens and allergen guidance for food businesses offer valuable information to read alongside this guide. Anaphylaxis UK and Coeliac UK also explain practical risk and communication needs clearly.

What is an allergen matrix?

An allergen matrix is a table that lists your menu items down one side and the 14 regulated allergens across the top. You then mark which allergens appear in each dish.

It’s a quick-reference system for service. Staff can check it before answering customer questions, and managers can use it to review recipes, train teams and update allergen information when ingredients change.

A good allergen matrix does three jobs:

1. Records allergen presence in each menu item.
2. Supports consistent answers across shifts and sites.
3. Creates an audit-friendly trail that shows you manage allergen information effectively.

The matrix can be paper-based, spreadsheet-based or built into an app or EPOS system. What’s important is that you maintain and update it regularly.

An allergen matrix is not a fail-safe. It only works when it reflects what actually happens in the kitchen. Staff still need to understand ingredients, cross-contamination risks and how dishes are prepared – especially when customers ask more detailed questions about whether the food you serve is safe for them.

Allergen matrix vs allergen menu

Businesses often mix up the terms “allergen matrix” and “allergen menu”. They can overlap, but they serve different purposes.

An allergen matrix is usually an internal working document. It’s detailed, structured and designed to support staff and managers. It can include notes, ingredient references and cross-contamination warnings that you would not necessarily print for customers. It also lets you make quick updates when suppliers change.

An allergen menu is a simplified customer-facing document. It usually lists each dish with allergen information, or it guides customers to ask staff for clarification. Some venues use symbols, numbers or short notes. Others provide a separate allergen guide. The key difference is that the allergen menu is designed for the customer experience specifically, whereas the matrix is for internal use.

Accurate allergen information also depends on recipe consistency. If chefs change ingredients or introduce substitutions without updating records, allergen information can quickly become unreliable. Many businesses use recipe cards alongside their allergen matrix to keep ingredients and preparation methods consistent across staff and shifts.

A reliable setup often looks like this:

• Recipe cards define the dish.
• The allergen matrix translates recipes into allergen answers.
• The allergen menu or customer system shares information clearly.

UK 14 allergens list

In the UK, food businesses must provide information on 14 regulated allergens whenever they are ingredients in the food being sold. They are often referred to as the 14 allergens.

• Celery
• Cereals containing gluten (wheat, rye, barley, oats, spelt, khorasan)
• Crustaceans (such as prawns, crab, lobster)
• Eggs
• Fish
• Lupin
• Milk
• Molluscs (such as mussels, oysters, squid)
• Mustard
• Nuts (tree nuts)
• Peanuts
• Sesame seeds
• Soya
• Sulphur dioxide and sulphites

Avoiding common mistakes

• Gluten is not a single ingredient. It is found in certain cereals, and it can also appear in ingredients like flour, breadcrumbs, batter, malt and some sauces.
• Nuts and peanuts are separate allergen categories. Peanuts are legumes, not tree nuts, but they still cause serious reactions for many people.
• Sulphites are often overlooked because they can appear in wines, vinegars, dried fruit, some sauces and preserved ingredients.
• Lupin often surprises teams because it can appear in some flours and baked goods, especially in specialist or imported products.

A strong allergen matrix makes it easier for your team to remember the 14 allergens.

How to create and maintain an allergen matrix

Creating an allergen matrix is not difficult, but it does need a structured approach. The most common problem is building the matrix once and then failing to keep it updated as recipes, suppliers or preparation methods change.

Decide what information the matrix should include

At a minimum, it should show:

• Dish name
• Version date
• The 14 allergen columns
• A notes column for cross-contact risks or supplier notes
• “Verified by” and “last reviewed” fields

Start with your full menu

Start by compiling your full menu list, including specials, children’s menus, sauces, sides, desserts, drinks and garnish options. If customers can order it, it should appear on the matrix.

Build a full ingredient list

Next, build a full ingredient list for each item, including bought-in sauces, marinades, spice blends and cooking oils where relevant. Then collect allergen information from supplier specifications, product labels and ingredient sheets.

Match the ingredients to the 14 allergens

Once you have the ingredient information, match each dish to the UK’s 14 regulated allergens and mark allergens consistently across the matrix. Cross-contamination risks should be recorded separately from ingredient allergens so staff can distinguish between “contains” and “may be exposed to”.

Keep preparation methods consistent

Your allergen information needs to match how dishes are actually prepared and served. If staff swap garnishes, change sauces or substitute ingredients without updating records, allergen information can quickly become inaccurate and present a risk to customers.

Many businesses use recipe specifications alongside the allergen matrix to keep preparation consistent across shifts and locations.

Check and maintain the matrix

Before using the matrix, have a second person check it against recipes and supplier information. Staff should also know where the matrix is stored, how to read it and when to escalate questions they are unsure about.

For businesses with multiple locations, using the same matrix format across all sites can help keep allergen information more consistent for both staff and customers.

Allergen matrix example for menus

Imagine a grid where each menu item has a row, and each allergen has a column. You then mark which allergens appear.

Here’s an example showing the first five (yours should show all 14):

Menu item	Celery	Cereals	Crustaceans	Eggs	Fish
Menu item 1		Y			Y
Menu item 2			Y
Menu item 3	Y			Y

In a real matrix, you would link each dish back to actual ingredients, including sauces, dressings, marinades, spice blends and garnishes. The small extras often create the biggest risks. For example:

• A sprinkle of sesame seeds on a bun
• A drizzle of pesto containing nuts
• A stock cube containing celery
• A dessert garnish containing crushed nuts
• A sauce thickened with wheat flour

How to verify supplier allergens

Supplier information plays a major role in allergen accuracy, especially when kitchens use bought-in ingredients such as sauces, marinades, spice blends, desserts, buns or ready-made products. Allergen information can quickly become inaccurate if recipes or supplier products change without the matrix being updated.

A practical verification process looks like this:

• Request allergen specs for every bought-in product.
• Check the ingredient list and allergen statement when deliveries arrive.
• Store supplier specifications in a central folder (digital or paper format).
• Link each product to the dishes that use it.
• Recheck whenever the supplier, brand or packaging changes.

It is also important to watch for changes that are easy to overlook during busy deliveries. These can include:

• A new label design
• A “new and improved recipe” sticker
• A different pack size
• A different country of origin
• A different ingredients order

These changes should trigger a fresh allergen check before the product is used. If something has changed, update the matrix.

Many kitchens also include allergen checks as part of their goods-in process. This can include:

• Product name and code match approved list.
• Allergen statement matches the stored specification.
• No unexpected “may contain” changes.
• Packaging intact and readable.

Wholesaler substitutions can create additional risks. For example, if a supplier sends a different brand because the usual product is out of stock, allergen information may change even if the product seems similar. Businesses should have a clear rule that substituted products cannot be used until allergen information has been checked and the matrix updated if necessary.

Updating the allergen matrix when recipes change

So what happens when you introduce a new sauce, switch to a different bun, change a garnish, or add a seasonal topping? The dish still has the same name, so staff may assume it contains the same allergens – but this is how mistakes happen.

Treat allergen control like version control. Every time you change a recipe or ingredient that could affect allergens, update the matrix and communicate the change before service.

Practical change control process

• Require sign-off for recipe changes (chef lead or manager).
• Check allergen impact before the change goes live.
• Update the matrix with a new version date.
• Update recipe cards and prep sheets.
• Brief staff at pre-service or shift handover.
• Remove old versions from service points.

Quick internal checklist

• Did we add or remove any of the 14 allergens?
• Did we change suppliers for any ingredient?
• Did we change the garnish, bread, batter, crumb, sauce or marinade?
• Did we change the cooking method (affects cross-contact risk)?
• Did we add a shared fryer step or a shared grill step?

It also helps to include the recipe version on the matrix. That way, if allergen information changes, staff can trace it back to a specific recipe or ingredient update rather than relying on memory or outdated versions.

In multi-site businesses, centralise updates. If each site edits its own version, you could end up with multiple “truths”. One shared master matrix with controlled edits reduces that risk.

Cross-contamination risk notes in an allergen matrix

Cross-contamination, often called cross-contact in allergen management, is another layer of risk when it comes to allergens in kitchens. It can happen when allergen residues move from one food to another. This might occur due to the use of shared equipment, utensils, surfaces, oil or storage.

An allergen matrix can help manage this, but you must present it clearly. If you clutter the main grid with too many “may contain” marks, staff might stop trusting the document. Instead, use a dedicated notes column to record:

• The source of the cross-contact risk
• The controls used to reduce it
• Any limits on allergen claims

Risk	Control
Shared fryer is used for battered items containing gluten	No gluten-free claims. Offer an oven-cooked alternative.
Shared tongs are used for sesame and non-sesame buns	Use separate or freshly cleaned utensils.
Nut garnish is prepared on shared prep bench	Use a separate prep area or clean and sanitise between tasks.

Clear notes help staff answer customer questions more accurately. They also reduce vague reassurances such as “it should be fine”, which can create serious risks if cross-contact controls are not reliable.

Allergen matrix for takeaways and delivery

Takeaways and delivery create extra pressure points because customers often order without speaking to staff directly – for example, via an app. They may also add special instructions in notes fields, which staff can miss during peak service.

That is why allergen control for delivery needs both accurate information and a reliable process. A takeaway-friendly allergen matrix helps you:

• Answer phone queries quickly.
• Support online menu allergen statements.
• Train packers and runners to check special requests.
• Reduce mis-picks and wrong packaging.

Practical steps that strengthen allergen control for delivery

• Make allergen info easy to access at the point of ordering, not only in the kitchen.
• Use clear menu item naming so staff don’t confuse similar dishes.
• Flag allergen-related notes on tickets in a consistent way.
• Use a final check at packing, not only at cooking.
• Use separate packaging and labels for allergen-sensitive orders.
• Avoid making last-minute substitutions without an allergen check.

Condiments and extras

Condiments, dips and optional extras can change the allergen profile of an order, especially in takeaway and delivery settings where customers customise dishes through apps or order notes.

For example, a customer may request “no sauce”, but the dish could still contain allergens in a marinade, garnish or seasoning. Likewise, adding a dip or side order may introduce allergens such as milk, mustard, sesame or eggs.

Your allergen matrix should include optional sauces, dips, garnishes, sides and seasoning mixes so allergen information stays accurate when orders are customised.

It also helps to standardise how allergen information is communicated on tickets, packaging or customer queries. For example:

• “Contains: milk, eggs”
• “May be exposed to gluten due to shared fryer”
• “We cannot guarantee nut-free due to shared kitchen”

Clear, consistent wording reduces risk, which is crucial, but it also lessens confusion for both staff and customers.

Allergen information for PPDS foods

PPDS stands for “prepacked for direct sale”. It means food that is packaged at the same place it is sold and is already in that packaging before the customer orders or selects it. This can include sandwiches, salads, bakery items and other foods packed on-site for display or sale.

For PPDS foods, the label must show the name of the food and a full ingredients list, with any of the 14 regulated allergens emphasised. This is different from food packed after a customer orders it, where allergen information must still be provided but can be given in other ways, including verbally.

An allergen matrix can support PPDS labelling by helping you check which allergens appear in each product and keeping that information aligned with recipes and supplier specifications. However, the matrix is not the label. The label still needs the food name, full ingredients list and emphasised allergens. Many businesses build a simple process:

• The recipe card defines the ingredients.
• The ingredient list informs what’s on the label.
• The allergen matrix supports staff queries and cross-checks.

PPDS foods sold by distance selling, such as online or phone orders, also need allergen information before purchase and at delivery. This can be provided in writing or orally, but takeaway meals should still be clearly labelled so customers can identify suitable dishes.

How staff should use the matrix

Even the world’s best allergen matrix will fail if staff don’t use it correctly. You need a simple, repeatable routine that works seamlessly, even in high-pressure moments.

Here’s a practical staff routine:

• Listen carefully to the customer’s allergen question.
• Clarify the allergen and the dish, especially if there are variations.
• Check the matrix, even for familiar dishes. Don’t rely on memory.
• If the customer has a severe allergy, check cross-contact notes and controls.
• If you are unsure, escalate to a manager or the kitchen lead.
• Give a clear answer, not a vague reassurance.
• Record or flag the order clearly if it needs special handling.

Using the right language

It also helps to train staff on the right language to use. These phrases reduce risk:

• “Let me confirm that for you.”
• “This dish contains milk and mustard.”
• “We use a shared fryer, so we cannot guarantee it is free from gluten.”
• “We can offer an alternative that avoids that allergen.”

And these phrases create risk:

• “It should be fine.”
• “I think it is ok.”
• “We do not use nuts here” when you have nut-containing products in the kitchen.
• “It’s gluten-free” without confirming ingredients and cross-contact controls.

Staff should also know where the matrix is physically located, and it should be accessible during service. If it’s locked in an office, people will make guesses or try to rely on memory. Put it where decisions happen:

• At the till or service point
• In the kitchen pass area
• In the prep area for quick checks
• In the delivery packing area

Training is most effective if it includes short scenario practice. For example: “A customer asks about sesame in burger buns.” Short role-play practice sessions build confidence and reduce panic answers.

Common allergen matrix mistakes

Most allergen matrix mistakes happen because information changes faster than the system used to manage it. Recipes evolve, suppliers substitute products, staff make adjustments during service and records stop matching what is actually being served.

Common mistakes include:

• Building the matrix once, then never updating it.
• Forgetting bought-in ingredients like sauces, spice blends and dressings.
• Missing allergens in garnishes, toppings and sides.
• Mixing “contains” and “may contain” in a confusing way.
• Allowing substitutions without allergen checks.
• Using memory during service instead of actually checking the matrix.
• Not training new staff on how to read and use the matrix.
• Keeping multiple versions in circulation, including those that are out of date.
• Failing to include specials and seasonal items.
• Ignoring cross-contact risks from shared equipment.

Don’t let teams treat allergen management as a paperwork task rather than a crucial operational system. The fix is to make it part of daily routine:

• Goods-in checks trigger allergen checks.
• Recipe changes trigger matrix updates.
• Service questions trigger matrix use.
• Pre-shift briefings cover any allergen changes.

You can also reduce errors by simplifying your menu where possible. Complex menus with lots of variations increase the chance of inconsistent answers. A streamlined menu with standardised components is easier to manage safely.

Allergen matrix checks for inspections

During inspections or audits, assessors often want to see that you can provide accurate allergen information and that your process is consistent. An allergen matrix gives staff and managers a structured reference point, but inspectors will also look at how the system is maintained and used in practice.

Here’s a practical inspection-ready checklist:

• The matrix is present, accessible and legible.
• The matrix has a clear version date and review date.
• The matrix covers the full menu, including specials and extras.
• The matrix links to recipes or ingredient references.
• Supplier allergen information is available and up-to-date.
• Staff can explain/demonstrate how they answer allergen queries.
• Cross-contact risks are identified with sensible controls.
• Updates happen when ingredients or suppliers change.
• Old versions have been removed and replaced.
• Staff training records or briefings show allergen awareness.

Inspectors may also speak to staff directly to check how allergen information is handled during service. Staff should know where the allergen matrix is kept, how to use it and when they need to double-check information with the kitchen rather than guessing.

Final thoughts

An allergen matrix is ultimately about keeping information accurate as food moves through a kitchen. Ingredients change, suppliers substitute products, specials come and go and staff work under pressure. A matrix gives businesses a structured way to keep allergen information connected to what is actually being prepared and served, rather than relying on memory or assumptions.

The strongest systems are usually the simplest ones: clear recipes, consistent processes, updated records and staff who know when to stop and check rather than guess. When allergen management becomes part of everyday kitchen routine and is taken seriously by everyone involved, it becomes far easier to maintain safely and consistently.