I'm sure I'm not the first to do this and it may be mentioned on here already, but I made the best chocolate cake ever last night from a devil's food cake mix. I followed instructions on the box, then added about 1 tsp. ground cayenne pepper and 1 tsp. cinnamon. We ate most of the cake warm with a purchased white frosting , but the flavor was oh, sooooooo enchanced with the additions.