Preheat oven to 375 degrees.
Peel and thinly slice the apples into a large bowl.
Melt butter in a large casserole dish.
Combine baking powder.
Lastly, combine milk and stir the ingredients until made into a batter.
Pour the batter on the butter (without mixing).
Put apples in the center of the batter (without mixing).
Bake in 375 degree oven until batter covers apples and crust browns, approximately 30 to 40 minutes.