Sweet Omelet No. 1

The flour-butter-milk base can be prepared up to 1 day ahead through step 6, stored covered in the refrigerator. Bring to room temperature before folding in the beaten egg whites and baking. The egg whites must be beaten and the dish baked just before serving.

This dish does not store well and must be served immediately upon baking. Like all soufflés, it will deflate within minutes of leaving the oven and cannot be successfully reheated.