3 cups blueberries, fresh or frozen 1/2 cup sugar 1 box yellow cake mix 1/2 cup (1 stick) butter (melted and browned, if desired) 1. Preheat oven to 350 degrees F. 2. Spray a 9x11 or 9x13 dish with nonstick cooking spray. Mix the blueberries and sugar and pour into the bottom of the prepared