I guess I should let you know something first though... I have a secret. Promise not to tell anyone?
I used a box mix.
Yep! I did. I thought the first time I attempted this technique I could really use some help from Betty Crocker. So again I went, spatula in one hand, cake pan and CAKE MIX in the other, into the kitchen to attempt the cake.
Here is how I did it:
Step 1: Make the batter
Follow directions on your box mix (or homemade recipe, you over-achiever) and divide the batter into 3 seperate bowls. These become the layers to the cake.
You really could make more layers here depending upon how much batter you stir up.
Step 2: Color, color, color!
Add food coloring to each bowl of batter, increasing the amount you put in per bowl. I think when I finished mixing in the color I put 6 drops in the first bowl, 9 in the second, and 12 in the 3rd. Really this is your preference. You just need to make sure the bowls go from light to dark.
Step 3: Get cooking
Poor each of the colored mixtures into separate round cake pans and place into the oven. I kind of just guessed here as to how long to cook each cake. It ended up being 16 minutes per pan.
Step 4: Let cool completely!
This is always the hardest part for me.
Step 5: Stack em'
Stack the layers from lightest to darkest, adding a layer of icing in between each cake.
Step 6: Finishing
Frost the rest of the cake. That's it! ...and the best part is cutting the first slice to sneak a peak at the results.