Preheat oven to 425 degrees. Melt butter in a 9" pie pan in oven. Keep pan in oven to stay hot.
Blend eggs and milk together in a blender; add flour to egg mixture and blend some more. Pour into preheated and buttered pie pan. Bake 18 minutes. Pancake will rise and puff.
Serve hot with your favorite topping. Makes 4 servings.