Burger King Allergen Menu UK (2026): Full 14-Allergen Guide
If you’re managing a food allergy or intolerance, the Burger King allergen menu is the single most important thing to check before you order. This guide covers every item on the current UK menu against all 14 legally-regulated allergens — burgers, chicken, sides, drinks, desserts and breakfast — with clear “Contains” vs “May Contain” labelling, plus the cross-contact risks that a simple allergen list doesn’t always spell out.
Whether you’re checking the burger king allergen menu uk before a family visit, searching burger king allergens for a specific ingredient, or you found this page after typing burger king allergy menu into Google, everything you need is organised by category below.
Editorial Standards
Reviewed by: The Menu Burger King Editorial Team
Last reviewed: Updated yesterday
Method: Allergen information on this page is compiled from Burger King UK's published allergen documentation, in-app allergen filters, and standard UK fast-food industry preparation practices for shared-kitchen environments. Where we could not independently confirm a data point against Burger King's live, store-specific allergen matrix, it is clearly marked Estimated.
Correction policy: Menu items, recipes and suppliers change without notice, and allergen risk can vary store-by-store. If you spot outdated or incorrect information on this page, please use our Contact Us page to let us know and we'll review and correct it promptly.
This page should support your decision-making, not replace a direct check with Burger King staff or the official BK app.
Understanding the 14 UK Legal Allergens
UK law requires every food business to declare 14 allergens across its menu. This burger king allergen menu guide uses the same 14, shown here with the short codes used in the tables below:
| Code | Allergen | Code | Allergen |
|---|---|---|---|
| G | Gluten (Wheat, Barley, Rye, Oats) | Ce | Celery |
| C | Crustaceans | Mu | Mustard |
| E | Eggs | Se | Sesame |
| F | Fish | Su | Sulphites (Sulphur Dioxide) |
| P | Peanuts | L | Lupin |
| S | Soya | Mo | Molluscs |
| M | Milk | N | Tree Nuts |
Contains = the allergen is a declared ingredient. May Contain = cross-contact risk only, usually from shared fryers, broilers or toasters — not a direct ingredient, but still a real risk if you have a severe allergy.
Burger King Allergen Menu: Burgers & Flame-Grilled Range
All buns at Burger King UK are toasted in a shared toaster and contain gluten and sesame as standard — this applies across the entire burger king allergy menu, so if you have a gluten or sesame allergy, every standard bun is out unless you go bunless.
| Item | Contains | May Contain (Cross-contact) |
|---|---|---|
| WHOPPER | G, Se | M, E, Mu |
| Double WHOPPER | G, Se | M, E, Mu |
| WHOPPER with Bacon and Cheese | G, Se, M | E, Mu, Su |
| Bacon Double Cheese XL | G, Se, M | E, Mu, Su |
| BBQ Steakhouse Angus | G, Se, M | E, Mu, Su |
| Bacon Double Cheeseburger | G, Se, M | E, Mu, Su |
| Cheeseburger | G, Se, M | E, Mu |
| Hamburger | G, Se | M, E, Mu |
| Classic Double Beef Melt | G, Se, M | E, Mu, Su |
Estimated — beef patties themselves are typically free from major allergens beyond cross-contact, but every burger is cooked on a shared flame-grill broiler alongside chicken and other items, so cross-contact with gluten, milk, egg, soya and mustard is always possible. Always confirm current formulations with staff or the BK app.
Gourmet Kings & Specials Allergen Table
| Item | Contains | May Contain (Cross-contact) |
|---|---|---|
| The Wagyu | G, Se, M | E, Mu, Su |
| Wagyu Wellington | G, Se, M | E, Mu, Su |
| Big King | G, Se, M | E, Mu |
| Big King Royale | G, Se, M, E | Mu, Su |
| Truffle Loaded King Fries | G, M | E, Mu, Su |
Crispy & Tender Chicken — Allergen Breakdown
Every crispy chicken item on the burger king allergen menu contains gluten from the coating, in addition to egg and mustard from the batter mix and sauces. Chicken items are cooked in shared fryers, which is the single biggest cross-contact risk zone on the entire menu.
| Item | Contains | May Contain (Cross-contact) |
|---|---|---|
| Chicken Royale | G, E, Mu, Se | M, S, Su |
| Double Chicken Royale | G, E, Mu, Se | M, S, Su |
| BBQ Steakhouse Crispy Chicken | G, E, Mu, Se, M | S, Su |
| Chicken Royale Bacon & Cheese | G, E, Mu, Se, M | S, Su |
| Chicken Nuggets (6pc) | G, Mu | E, Se (fryer cross-contact only, not a declared ingredient) |
| Classic Chicken Melt | G, E, Mu, M | Se, S |
Our team’s pick for anyone avoiding egg as a declared ingredient (rather than just cross-contact): Chicken Nuggets carry egg only as a fryer cross-contact risk, not as a listed ingredient — but this is Estimated and should always be re-checked in-app, since fryer allocation can change store to store.
Veggie, Vegan & Plant-Based Allergen Menu
Plant-based items are built around a soya patty, and the standard bun still contains gluten and sesame — so none of Burger King UK’s vegan items are gluten-free, even though they’re meat-free.
| Item | Contains | May Contain (Cross-contact) |
|---|---|---|
| Vegan Royale | G, S, Se | M, E (shared grill) |
| Plant-Based WHOPPER | G, S, Se | M, E (shared grill) |
| Halloumi Fries | G, M, E | Mu, Se |
| Fries (Vegan) | None declared | G, M, E, Mu, Se, Su (shared fryer) |
Because the Vegan Royale and Plant-Based WHOPPER are cooked on the same broiler as beef and chicken items, Burger King UK cannot guarantee these are fully vegan or vegetarian in every branch — this is the most commonly missed detail on other allergen guides, and one of the most-asked questions we see about the burger king allergy menu.
Sides — Burger King Allergen Menu
| Item | Contains | May Contain (Cross-contact) |
|---|---|---|
| Fries (Regular) | None declared | G, M, E, Mu, Se, Su (shared fryer with breaded items) |
| Loaded King Fries | M | G, E, Mu, Su |
| Loaded King Fries with Bacon | M, Su | G, E, Mu |
| Garlic & Jalapeno Chicken Fries | G, Mu | E, M, Se, S |
| Chilli Cheese Bites | G, M | E, Mu, Se |
| Onion Rings | G, M | E, Se |
Even Burger King UK’s plain fries — which contain no declared allergens themselves — are fried in a shared fryer used for breaded chicken and cheese products. If you have coeliac disease or a severe allergy, treat the fries as at-risk, not allergen-free.
Breakfast Menu Allergens
| Item | Contains | May Contain (Cross-contact) |
|---|---|---|
| Breakfast King | G, E, M | Mu, Su, Se |
| Fully Loaded Croissan'wich with Egg | G, E, M | Mu, Su |
| Chicken Strips Croissan'wich with Egg | G, E, M | Mu, Se |
| Beefacon Croissan'wich with Egg | G, E, M | Mu, Su |
| Chick'N Crisp Croissan'wich with Egg | G, E, M | Mu, Se |
| Beef Croissan'wich with Egg | G, E, M | Mu |
| Potato Bites | G | M, E (shared fryer) |
Estimated — croissant-based items are made with a wheat/gluten dough as standard and contain egg and milk as declared ingredients across the range.
Drinks, Coffee & Desserts Allergen Menu
| Item | Contains | May Contain (Cross-contact) |
|---|---|---|
| Vanilla Milkshake | M | G, Su |
| Chocolate Milkshake | M, S | G, Su |
| Strawberry Milkshake | M | G, Su |
| Cappuccino / Latte / Flat White | M | — |
| Vanilla Sundae | M | G, Su |
| Chocolate Brownie Cheesecake Bar | G, M, E, S | N (possible traces), Su |
| Small Ben & Jerry's Cookie Dough | G, M, E | N, P (traces vary by flavour) |
| Twix Fusion | G, M, S | N (traces) |
Soft drinks such as Coca-Cola, Fanta and Sprite Zero carry no declared allergens in their standard UK formulation, making them one of the safest picks on the entire burger king allergen menu for most allergy types.
Dips & Sauces — Allergen Info
Allergen information for dips is also printed directly on the lid or sachet at UK restaurants — always check the physical packaging as your final confirmation.
| Item | Contains | May Contain (Cross-contact) |
|---|---|---|
| Sweet Chilli Dip Pot | — | Ce, Mu, Su |
| BBQ Dip Pot | — | Ce, Mu, Su |
| Cheddar Cheese Sauce XL | M | Mu |
| BBQ Mayo | E, Mu | Su |
Items to Check First for Common Allergies (Our Recommendation)
| Dietary Need | Our Team's Recommendation | Note |
|---|---|---|
| Avoiding gluten | No item is certified gluten-free — see our Gluten Free Menu guide | All buns contain gluten; plain fries carry cross-contact risk only |
| Avoiding milk (dairy) | Hamburger, Cheeseburger without cheese, plain Fries | Always request no cheese/mayo explicitly |
| Avoiding egg as an ingredient | Chicken Nuggets, Hamburger | Egg risk is cross-contact only on these two, not declared — Estimated |
| Avoiding peanuts & tree nuts | Most core menu items | BK UK does not use peanuts as a standard ingredient; dessert traces are the main risk area |
| Vegan / plant-based | Vegan Royale, Plant-Based WHOPPER, Fries (Vegan) | Not guaranteed allergen-free due to shared grill/fryer — see our Vegan & Vegetarian Menu |
Cross-Contact: The Part Most Allergen Menus Skip
Every UK Burger King kitchen shares equipment across multiple menu items:
- Toaster — every bun passes through the same toaster, so gluten and sesame cross-contact is universal, even on items that don’t list either as a direct ingredient.
- Broiler (flame grill) — beef and other grilled items share the same open-flame surface.
- Fryers — chicken, fries, onion rings and other fried items are typically cooked in shared oil.
- Prep surfaces & utensils — sauces, toppings and garnishes are prepared on shared counters.
Because of this, Burger King UK cannot guarantee any single item is 100% free from a specific allergen, even when that allergen isn’t listed as a declared ingredient. If you have a severe or life-threatening allergy, always speak to a manager in person before ordering, rather than relying on this page — or any allergen page — alone.
How to Order Safely at Burger King UK
- Check the BK app or in-store allergen folder first — store-level formulations can differ slightly from this general guide.
- Tell staff about your allergy clearly and before you order, not after your tray arrives.
- Ask about fryer allocation if you’re avoiding gluten, egg or dairy via cross-contact — some branches run separate fryers for certain items.
- Request fresh gloves and a clean prep area for severe allergies.
- Read the dip/sauce packaging — it’s printed on the lid for a reason.
- When in doubt, choose a simple item — a plain Hamburger or plain Fries carries fewer allergen touchpoints than a Loaded or Gourmet Kings item.
FAQs — Burger King Allergen Menu
What are the 14 allergens on the Burger King allergen menu?
Gluten, crustaceans, eggs, fish, peanuts, soya, milk, tree nuts, celery, mustard, sesame, sulphites, lupin and molluscs — the same 14 every UK food business must declare by law.
Does Burger King UK have a gluten-free bun?
No. As of 2026, Burger King UK does not offer a certified gluten-free bun, and every standard bun contains both gluten and sesame.
Are Burger King fries safe for a gluten allergy?
Plain Fries contain no declared gluten as an ingredient, but they’re cooked in a shared fryer alongside breaded, gluten-containing items, so cross-contact is possible. They’re not certified gluten-free.
Does Burger King use peanuts or tree nuts? Peanuts are not a standard ingredient across the UK menu. Tree nut traces are mostly limited to certain dessert items, such as Ben & Jerry’s tubs, depending on flavour.
Is the Vegan Royale free from milk and egg?
The patty and bun formulation is plant-based, but because it’s cooked on a shared grill with meat, dairy and egg products, Burger King UK cannot guarantee it’s 100% free from milk or egg cross-contact.
Can I get an ingredient list, not just an allergen list, at Burger King UK?
Full ingredient breakdowns are available via the BK app and in-store allergen folder — this page focuses on the 14 legally-regulated allergens rather than a complete ingredient list.
Does Burger King UK allergen information vary by branch?
Yes. Franchise-operated branches can occasionally differ slightly on supplier or preparation practices, which is why checking with in-store staff remains important even after reading this guide.
How often is the Burger King allergen menu updated?
Burger King UK typically updates its allergen information whenever a recipe, supplier or menu item changes — this page is reviewed and refreshed periodically to stay aligned with those changes; see the Editorial Standards box above for the current review date.
Are Burger King desserts safe for a nut allergy?
Most sundaes and shakes carry no nut ingredients, but items like Ben & Jerry’s tubs and cheesecake bars can carry nut traces depending on flavour — always check the individual product label.
Is Burger King halal and allergen-friendly at the same time?
Halal status and allergen status are separate things — halal certification relates to how meat is sourced and prepared, not allergen content. See our dedicated Is Burger King Halal? guide for that specific question.
Final Thoughts
The Burger King allergen menu covers a lot of ground — 14 legal allergens across burgers, chicken, plant-based items, sides, breakfast, drinks and desserts — and the biggest single risk across almost every category isn’t a declared ingredient, it’s cross-contact from shared toasters, broilers and fryers. If you’re managing a severe allergy, treat this guide as your starting point, then confirm directly with staff or the BK app before you order.
For the full picture of what’s on the menu, head back to our Burger King Menu UK homepage, check exact pricing on our Burger King Prices page, or if gluten is your specific concern, go straight to our dedicated Burger King Gluten Free Menu guide.