How to Set Up Allergen Filters on Your Digital Menu

What an allergen filter is, and why structure matters

A filter is only as good as the data behind it. If allergens appear only as free text in a dish description, a system cannot reliably filter on them. To work, each dish needs its allergens recorded as separate, consistent tags or fields, the same way for every item on the menu.

This is why the real work happens before any software. A filter that hides everything containing nuts is only accurate if every dish that contains nuts has actually been marked. A missing tag does not mean a dish is safe. It means nobody has recorded the answer yet.

Think of the filter as a convenience layer on top of good records, and treat the records as the important part.

Build the allergen data before you build the filter

Start with a master list of the allergens you will track, based on what your local rules require and what your guests ask about. Use the same names in every language you publish, so a guest reading the Bulgarian menu and one reading the English menu see the same information.

Then go dish by dish, from the actual recipe and the actual labels on the ingredients you buy, not from memory. Ingredients like sauces, stock, bread coatings and dressings are where allergens hide. Ask suppliers for their ingredient information and keep it on file.

Record two things separately where you can: allergens a dish deliberately contains, and allergens that might be present through shared equipment or cross-contact. Guests with severe allergies care about the difference. Give one named person, usually the head chef, responsibility for approving every entry and for updating it whenever a recipe or supplier changes.

Present allergen information clearly to guests

Place allergen information next to the dish, where it is seen before ordering, not on a separate page that most guests will never open. Icons help at a glance, but pair them with plain text and include a legend so nobody has to guess what a symbol means.

Be careful with wording. A filter can flag dishes that contain a chosen allergen, but avoid labels like "allergen-safe" or "guaranteed free from", which promise more than any menu can deliver. Where information is unknown or unconfirmed, say so instead of leaving it blank, because a blank looks like "none" to a worried guest.

Add a standing line inviting guests to tell staff about any allergy before ordering. That single sentence keeps the conversation with a human where it belongs.

Why the menu never replaces staff and kitchen controls

A screen cannot see what happens in the kitchen. Shared fryers, shared boards, a substituted ingredient on a busy night or a supplier changing a product can all make a printed or digital entry wrong. Only trained people following clear procedures can catch these things.

Train your team so every server knows the allergen procedure: how to confirm the details with the kitchen, how the order is flagged, and what to do if there is any doubt. A guest who says they have an allergy should get a human answer, whatever the menu says.

Use the digital menu to make that conversation faster and better informed, and to give guests a reliable first look. Do not use it as the only safeguard.

Questions to ask a digital menu provider

If allergen filtering matters to you, ask any provider to show it working before you commit. Can allergens be recorded per item as structured fields, or only as free text? Can guests filter by allergen, or only read tags? Can the allergen wording be translated into every language you use? How quickly does a correction appear on guests' phones?

Also ask who can edit allergen information, whether changes are logged, and what happens to your data if you leave. Do not assume a feature exists because a demo hinted at it. Confirm the exact capability in writing.

The parts of a platform that help here are the general ones: easy menu updates, so a corrected entry can be live in minutes, and multi-language support, so the same corrected information reaches every guest. For any specific allergen capability, confirm the details directly with the provider, including us at [email protected].

Frequently Asked Questions