Eating out · American fast food / burgers
Low FODMAP at McDonald's
McDonald's plain-grilled beef patties and potato-based sides are genuinely simple, so the safest path is to build a plain burger yourself and stay away from the branded sauces. Almost every source of trouble here is a squeeze bottle or a seasoning packet, not the core proteins — garlic and onion powder show up in the Big Mac sauce, tartar sauce, ranch, and several breaded/seasoned items.
✅ Safest picks
Plain Hamburger or Cheeseburger (no onion)
The beef patty itself is just beef, salt, and pepper with no onion/garlic seasoning; the main FODMAP load is the wheat bun (fructans), which is a modest, single-serving amount.
💬 Order it: Ask for it 'plain' or 'no onion, no pickle if you're sensitive to vinegar'; keep ketchup and mustard to a small amount or ask for them on the side.
World Famous Fries (small/medium, plain)
Potatoes, oil, dextrose and a leavening/anti-foaming agent — no onion or garlic in the US recipe.
💬 Order it: Don't add any seasoning packet some locations offer; the trace wheat/dairy flavoring in the coating is a minor asterisk if you're being very strict, but it isn't a garlic/onion risk.
Hash Browns
Shredded potato, oil, salt and starch — no aromatics in the standard recipe.
💬 Order it: Order as-is; no modification needed.
Egg McMuffin, ordered bunless ('unwrapped')
Egg, Canadian bacon and a small slice of cheese are all low-risk on their own; removing the English muffin removes the only real fructan source in the item.
💬 Order it: Ask for it 'unwrapped' / without the muffin, or bring your own low-FODMAP bread/wrap and rebuild it at the table.
Sausage & Egg, bunless (no biscuit/muffin)
The sausage patty is pork and spices (sage, pepper) without onion or garlic in the standard blend; skipping the biscuit avoids both wheat and extra butter/dairy.
💬 Order it: Order the sausage and egg components only, or ask for a lettuce-wrap style if your location will do it.
⚠️ Skip these
Big Mac
The signature 'special sauce' lists both onion powder and garlic powder near the top of the ingredient statement, and the sandwich uses two wheat buns instead of one.
Chicken McNuggets with dipping sauce
The seasoning blend applied to the chicken and breading includes onion powder, and popular dips (BBQ, Big Mac sauce style, sweet & sour) frequently add more onion/garlic or high-fructose sweetener.
Quarter Pounder with Cheese, as typically served
Standard build adds a layer of raw chopped onion on top of the wheat bun — the onion is one of the most concentrated fructan sources on the whole menu.
McFlurry / soft-serve shake
Ice-cream-based desserts carry a large dose of dairy in one serving.
Good to know
- •The burgers and fries are simpler than the sauces — build plain and skip anything with 'special sauce,' BBQ, tartar, or ranch in the name; those are where hidden garlic/onion powder lives.
- •Ask for sauces on the side or skip them; plain ketchup and mustard in small amounts are generally fine.
- •Breaded and seasoned items (nuggets, crispy/grilled chicken sandwiches, Angus-style seasoned patties) can carry onion powder in the seasoning itself, not just in a sauce — when in doubt, ask staff to check the current ingredient card, since recipes are updated over time.
- •One regular wheat bun is a smaller fructan load than most people assume; it's stacking two buns (Big Mac) or a whole sandwich plus fries plus a shake in one sitting that adds up.
- •A single slice of American or cheddar cheese is aged/lower-lactose and usually fine in normal burger portions — the real dairy risk on this menu is the ice-cream desserts, not the cheese.
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.