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Checked July 2026Chain guide

Low-FODMAP at McDonald's

A plain beef patty and fries is one of the most reliable fast-food fallbacks anywhere. The garlic and onion live almost entirely in the special sauces and the reconstituted onions — dodge those and the core menu is manageable.

You’re allowed to ask questions at a counter. A short, specific request — “is there onion or garlic in that?” — is normal, reasonable, and needs no medical backstory. The scripts below give you the exact words.
Pocket-sized: order, ask-for, and skip on one page.

McDonald's order card

phasediet.com/eating-out/mcdonalds

✓ Order

  • Plain hamburger or cheeseburger patty
  • Fries (small or medium)
  • Plain scrambled or folded egg
  • Side salad, no croutons, dressing on the side

~ Ask for a change

  • The bun
  • The burger build

✗ Skip

  • Big Mac / special sauce
  • Reconstituted onions
  • Buns, McMuffins, wraps and hotcakes
  • Sweet, BBQ and creamy dipping sauces
  • Milkshakes and McFlurry

Say this

  • “A plain cheeseburger — just patty and cheese, no bun, no sauce, no onion.”
  • “Can I get the patty in a lettuce wrap?”

Checked July 2026 — menus and recipes change, so confirm with staff. From phasediet.com/eating-out/mcdonalds

What to order

These are the dependable low-FODMAP picks — and why each one is a safe bet.

Plain hamburger or cheeseburger patty

100% beef with salt and pepper — low-FODMAP; open or skip the bun.

Fries (small or medium)

Potato from a dedicated fryer — low-FODMAP in a normal serving.

Plain scrambled or folded egg

Plain egg is low-FODMAP; ditch the muffin.

Side salad, no croutons, dressing on the side

Plain leaves you can dress with oil or a little of your own.

What to ask the kitchen to change

These can work — with one question or one small adjustment. Here’s exactly what to ask.

The bun

Buns are wheat. Ask for it lettuce-wrapped where offered, or eat the patty and toppings without the top bun.

The burger build

Ask for no Big Mac / special sauce, no reconstituted onions, and no relish. Plain patty, cheese, and lettuce is the safe build.

What to skip

Not forever — most of these come back during reintroduction. During elimination, they’re the reliable triggers to leave off.

Big Mac / special sauce

Onion and garlic.

Reconstituted onions

Onion.

Buns, McMuffins, wraps and hotcakes

Wheat.

Sweet, BBQ and creamy dipping sauces

Onion, garlic, and often HFCS.

Milkshakes and McFlurry

A heavy lactose (and often polyol/HFCS) load.

The exact words to say

Specific beats vague every time. Most staff won’t know what “low FODMAP” means, but they can absolutely answer “is there onion or garlic in that?”

“A plain cheeseburger — just patty and cheese, no bun, no sauce, no onion.”
“Can I get the patty in a lettuce wrap?”

Good to know

  • →Plain beef patty plus a small fries is the anywhere-fallback order.
  • →Skip the reconstituted onions and any 'special sauce' — that's where the garlic and onion hide.
  • →A sachet of ketchup is fine; it's the mayo- and BBQ-based sauces to watch.

More chain guides

Chipotle→Starbucks→Subway→Chick-fil-A→Panera→Domino's→

Or browse all eating-out guides.

Flared anyway?Sometimes you do everything right and your gut still reacts — that’s IBS being unpredictable, not a personal failure. Here’s why restaurants flare IBS and how to recover.

This guide is for general information only and is not medical advice. Menus, recipes, and kitchen practices change and vary by location, and FODMAP tolerances differ from person to person — always confirm with staff and go by your own experience. New to the diet? Start with our guide to the low-FODMAP diet.