Which McDonald's sandwich is served with just half a slice of American cheese instead of a full slice?
In this Trivia Today we have the following question: Which McDonald's sandwich is served with just half a slice of American cheese instead of a full slice? Continue reading below to find the correct answer!
🎯 Trivia of the Day — July 29, 2026
Which McDonald's sandwich is served with just half a slice of American cheese instead of a full slice?
The correct answer is Filet-O-Fish.
The Filet-O-Fish is the only standard McDonald's sandwich traditionally made with half a slice of American cheese. The sandwich was introduced in 1962 by Cincinnati franchise owner Lou Groen, who created it to appeal to Catholic customers looking for a meatless option on Fridays during Lent. McDonald's found that a full slice of cheese overwhelmed the mild flavor of the fish, so the recipe was adjusted to use only half a slice—a practice that has remained part of the sandwich's iconic and signature preparation for decades.