Preheat oven to 350 degrees F and spray a 9 x 13-inch pan with nonstick spray.

In a large bowl, stir together angel food cake mix and lemon pie filling.

Once fully mixed, add to the prepared pan and bake for about 35 minutes until fully cooked and the top is lightly browned.

Let the cake cool, cut into bars and, if desired, sprinkle with powdered sugar.