I've done the same recipe but use only one can of lemon pie filling. After the bars are cooled, I dust very lightly with powdered sugar. It just looks nicer. I just made a recipe last night using one box of Angel Food cake mix, 1 can Cherry Pie filling and about 2/3 c. of Hershey's unsweetened cocoa. Add cocoa to dry cake mix, stir until blended, add the can of pie filling, stir again until well blended. Grease, or spray a 9x13" pan and bake at 350º for 30 minutes or until knife inserted comes out clean. This is delicious! No fat, no cholesterol and it tastes like Black Forest cake. If you really want to go over the top, you can add a touch of chocolate frosting, but you really don't need to.