1 Preheat Oven To 400 Degrees F. 2 Grease 8" Square Pan Or 9" Round Pan. Mix Cake Ingredients. Spread Cake Batter In Pan. Insert Apple Slices Into The Batter Evenly Throughout The Cake. 3 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. 4 Bake 20 Minutes Or Until Golden Brown, Testing With A Toothpick.