Burgers, chicken, fish, breakfast, and desserts guidance based on reviewed public sources for United States.
If you're eating at McDonald's with an egg allergy, breakfast sandwiches aren't the only place you'll want to look. The Egg McMuffin names egg directly, and the Surf and Turf ingredient panel lists egg in tartar sauce. McDonald's also says normal kitchen operations may involve shared cooking and preparation areas, equipment, and utensils.
If you're considering McDonald's with a fish allergy, the clearest confirmed concern is the fish filet patty. The official Surf and Turf ingredient panel identifies it as pollock, and the restaurant-wide notice says cooking areas, equipment, and utensils may be shared. The published page doesn't provide enough detail to tell you what fish-specific controls a location uses.
If you're reviewing McDonald's for a milk allergy, cheese isn't the only ingredient you'll need to check. The Egg McMuffin description names both butter and American cheese, while the Surf and Turf panel lists milk in its fish filet patty and cheese. The chain's shared-kitchen notice also means a modification won't answer every preparation question.
If you're checking a McDonald's order for sesame, don't rely on whether you can see seeds on the bun. The Triple Cheeseburger's regular bun says it may contain sesame, and McDonald's warns that normal operations may use shared preparation areas, equipment, and utensils.
If you're reviewing McDonald's for a soy allergy, you'll need both the ingredient lists and the formal allergen statements. The Triple Cheeseburger page lists soy in American cheese and soybean oil in the bun. The Surf and Turf page lists soy in cheese, with soybean oil appearing in the bun, fish patty, and tartar sauce.
If you're eating at McDonald's with a wheat allergy, the bun isn't the only component you'll need to review. The Triple Cheeseburger panel lists wheat in its regular bun, and the Surf and Turf panel identifies wheat in both the bun and fish filet patty. A no-bun request still calls for a full component check and a conversation about shared preparation.