Preheat oven to 350.

Line an 8x8 brownie pan with foil and lightly grease with cooking spray; set aside.

Combine brownie mix and sprite in a medium mixing bowl; whisk until no lumps appear. Batter will be thin.

Pour batter into prepared pan and bake for 42 to 45 minutes, or until a toothpick inserted in the center comes out clean.

Cool completely before cutting into bars.

Serve.