These are sometimes called Dutch Babies, for no reason I can find on the internet. They are related to popovers and cream puffs but a little easier to make. If it poufs up, great. If it falls flat, it's like a cross between an omelet and a pancake. Either way, it tastes great with sliced fruit and yogurt on top.
4 T butter
3/4 c. milk
3/4 c. flour
pinch of salt
1 t. sugar, optional
Heat oven to 400° F.
Place butter in a 2 quart casserole dish. Put it in the oven for 5 minutes, until butter melts.
While butter is melting, use your blender to mix the remaining ingredients until smooth.
Pour batter into the hot casserole dish. Bake 15-25 minutes, until puffed and golden brown. Deeper dishes will need a longer cooking time. Flatter, wider dishes will cook faster but may not puff up as much.
Serve hot with sliced fruit, yogurt, pudding, etc on top.