Easy Blueberry Upside Down Cake1 Servings. Ingredients1 pint blueberries1/4 cup sugar1 package yellow cake mixDirectionsWash and pick over blueberries.Pour washed blueberries into buttered casserole (1 1/2 quart size) and sprinkle with 1/4 cup sugar.Prepare cake mix and pour 1/2 of batter over blueberries.Bake according to directions.Make cupcakes with remaining batter.Category: Desserts