For the dish consisting of beaten eggs cooked until set and folded over, American writers prefer omelet, and this is the spelling recommended by U.S. dictionaries. In all other varieties of English, the French spelling, omelette, is preferred.
Examples
For example, these non-U.S. publications use the French spelling:
But the findings suggest that if you have diabetes, you may want to swap sunny side up for a whites-only omelette. [Globe and Mail]
This recipe is delicious using soft rolls, thin omelette and super-thin slices of prosciutto or ham. [Stuff.co.nz]
As the old saying goes, you do not make omelette without breaking a few eggs. [Sydney Morning Herald]
He is like someone with an allergy to eggs, drawn against his will to the lovely, fluffy omelette of married life. [Daily Mail]
And these U.S. publications use the American spelling:
But hey, you can’t make a revolutionary labor omelet without breaking some eggs. [Los Angeles Times]
I’m going to order an omelet—and stand there to watch that you don’t begin by pouring a cup of oil into the pan. [Forbes]
The cook wore a plastic glove on his right hand only, which made for an interesting Michael Jackson effect, but also produced a bare-hand-on-my-cheese-omelet effect [Wall Street Journal]
