Raspberry Peach Upside-Down Cake

Raspberry Peach Upside-Down Cake This cake is DANGEROUSLY good! I know you'll go back for more! INGREDIENTS FOR THE FRUIT TOPPING Cooking spray 1/2 c. (1 stick) butter, melted 1 c. granulated sugar (optional: 1/2 C to modify-peaches and raspberries will sweeten it) 2 large ripe peaches, sliced 1 (6-oz.) package raspberries 2 tsp. cornstarch, divided FOR THE CAKE 2 2/3 [...]