Preheat oven to 40 degrees F

Grease 8” square pan or 9” round pan. Mix cake ingredients. Spread cake batter in pan. Insert apple slices into batter evenly throughout the cake

Mix the topping ingredients of Bisquick, brown sugar and cinnamon. Spread topping mix over top of batter in pan. Add slices of butter all over the top

Bake 20 minutes or until golden brown