1 box white or yellow cake mix, prepared as per package directions.
(sidenote: I always prepare cake mix with unsweetened applesauce instead of oil. It makes
for a flavourful cake that has way less fat).
2 tbs cocoa powder
Food colour of choice (if desired)
1. Prepare cake batter and separate into two bowls. A box of cake mix will make roughly 5 cups, so I very roughly measured out 2.5 cups into a new bowl.
2. Add 2 tbs of cocoa powder to one bowl and stir to combine. Add food colouring to other bowl and stir to combine (or leave white if you want the zebra look).
3. Using a 1/4 cup measure, alternate batter into the center of greased cake pans. Just keep adding the batter to the center and gravity and the baking process will spread it all out for you. Check out this brief kitchen video I made that shows me alternating the colours:
5. Frost and decorate to taste. I used a white frosting so that the inside would seem more surprising when cut open. The frosting I used was marshmallow buttercream (my favourite).
Once the cake was iced white I noticed I still had some buttercream leftover, so I added 1 tsp of cocoa powder to it and piped some designs along the top and bottom. Fancy eh?