Preheat oven to 350. Spray or grease an 8x8 baking pan.
Pour prepared brownie mix in pan.
With an electric mixer, beat on medium speed next 6 ingredients. Pour over brownie mix gently. Spread to edges of pan with the back of a spoon.
Bake for 35-45 min or until knife inserted in center comes out clean.
Combine cool whip and cinnamon. When COMPLETELY cool (I refrigerated mine overnight) spread cinnamon cool whip on top.