Preheat oven to 350° F. Grease a 3-quart casserole dish; set aside.
Beat together eggs, milk and sugar. Add cheeses and melted butter and mix well. Stir in flour and baking powder and pour into a prepared dish.
Bake for 45 to 50 minutes or until knife inserted in center comes out clean. Cut into squares and serve.
Makes: 12