Eating out · Burgers & fast food
Low FODMAP at Burger King
Burger King is more workable than most burger chains because the flame-grilled patties are plain beef and the US fries are coated with rice flour instead of wheat. The catch: almost every default build stacks a wheat bun, sliced raw onions, and HFCS-sweetened ketchup, and the breaded items and dipping sauces hide onion and garlic powder. Strip builds down to meat, lettuce, tomato, pickles, and mayo and you can eat here with far fewer common trigger ingredients.
✅ Safest picks
Whopper (no bun, no onions, no ketchup)
The Whopper patty is 100% flame-grilled beef with no fillers, and lettuce, tomato, pickles, and plain mayo add no onion, garlic, wheat, or HFCS.
💬 Order it: Order it lettuce-wrapped or in a container with no bun, no onions, no ketchup; keep mayo, lettuce, tomato, and pickles. Add bacon if you want it more filling.
Bacon King (no bun, no ketchup)
Two plain beef patties, bacon, and American cheese (very low lactose) with mayo — the only common triggers in the standard build are the bun and ketchup, which you remove.
💬 Order it: Ask for no bun and no ketchup, keep the mayo and cheese. Eat it with a fork or lettuce-wrapped.
French Fries (value or small size)
BK's US fries are potatoes with a rice-flour coating — no wheat, onion, or garlic in the recipe — though they share a fryer with onion rings and breaded items.
💬 Order it: Stick to a value or small size, skip ketchup (HFCS) and dipping sauces; if you're very sensitive to cross-contact, make the burger your main and treat fries as a side taste.
Cheeseburger (no onions, no ketchup)
Plain beef patty and low-lactose American cheese are fine; the small wheat bun is the only meaningful trigger left once onions and ketchup come off.
💬 Order it: Order with mustard and pickles only — mustard is a lower-risk condiment here. Keep it to one; don't stack it with fries and a bun-heavy second item.
Whopper Jr. (no onions, no ketchup)
Same clean beef patty in a smaller portion, so the modest wheat bun is the main remaining trigger once the raw onions and HFCS ketchup are removed.
💬 Order it: Say 'no onions, no ketchup' explicitly — both are default. Mayo, lettuce, tomato, and pickles are fine; skip any add-on sauces.
⚠️ Skip these
Good to know
- •Say 'no onions' on every burger — sliced raw onions are a default topping on the Whopper line, cheeseburgers, and most builds.
- •Mayo and plain mustard are the lower-risk condiments; ketchup is HFCS-sweetened in the US, and BBQ, Zesty, Ranch, and Honey Mustard sauces carry onion, garlic, honey, or HFCS.
- •Go bunless or lettuce-wrapped: the flame-grilled beef patties and bacon are plain, so the bun is usually the biggest remaining wheat source.
- •Skip everything breaded — nuggets, Chicken Fries, crispy chicken sandwiches, Big Fish, mozzarella fries — the coatings mix wheat flour with onion and garlic powder.
- •US fries have a rice-flour (not wheat) coating with no onion or garlic, but they share a fryer with onion rings and breaded items — order small if cross-contact bothers you.
- •For drinks, pick water, unsweetened iced tea, or black coffee; US fountain sodas and shakes are HFCS- or lactose-heavy.
At a different restaurant? Photograph any menu and get every dish ranked in seconds.
Scan a menu — freeMenus and recipes change; scores reflect typical preparations and published FODMAP research. Informational only — not medical advice. Always confirm ingredients with restaurant staff.