Teeny Tiny Rainbow Cakes
- 1Measure out 6 sheets of parchment to line your 9”x13” pan - you'll want a couple inches of overhang on both long sides of pan.
- 2Preheat oven per cake baking directions on box.
- 3Divide cake batter evenly into 6 bowls.
- 4Color with liquid food coloring. I used a classic food color set for the red and yellow, a 2:1 yellow/red ratio for the orange, blue and purple from a neon set, and a custom mix of the neon and classic green on the green layer. You’ll need about 20 drops total in each bowl to get nice, vibrant colors.
- 5Place one of the parchment sheets in the pan. Secure the sides to make distributing the batter easier. I used binder clips, which worked great. (Remove these before baking!)
- 6Pour the first bowl of batter into the pan, and spread it just to the edges of the pan with a spatula. When you pour the batter in, it won’t look like much. Spread it out on the parchmentas evenly as possible, and pop it in the oven.
- 7Bake the layer for about 10 minutes. Watch it carefully - these thin little layers cook fast!
- 8Remove from oven and allow layer to cool on a cooling rack (in the pan) for 10 minutes.
- 9Remove layer from pan using the paper parchment handles, and place layer back on cooling rack to continue cooling.
- 10Repeat with remaining layers.
- 11Once you’ve baked all six layers, and allowed them to cool completely (won’t take long), grab a couple tubs of white frosting. Give the frosting a thorough stir so it’s nice and loose.
- 12Place the first layer back in the pan (leaving the parchment on). Spread about 1/3 of a tub of the white frosting evenly on the layer.
- 13Grab the next layer in your line-up. You can use the parchment to position it, lay it face down on the frosted first layer, and then just peel the parchment off.
- 14Repeat with remaining layers, until you get to the last one, which you won't frost.
- 15Wrap the pan with parchment (which won't stick to the cake) and then a layer of heavy foil and place in the freezer. Weigh the cake down using a cutting board or another pan, with a few pounds of frozen food or other freezer safe items on top.
- 16Let the cake freeze at least overnight.
- 17Several hours before serving, remove from freezer, unwrap, grab the cake slab out of the pan with the parchment handles, and get ready to cut. Cutting is best done when the cake is frozen!
- 18Cut with a 2 1/2” diameter round biscuit cutter – and keep in mind that you’ll need a tall cutter with handles that don’t interfere too much. Once you've cut, just push the cake out of the cutter, gently but firmly onto a plate or cutting board. Repeat with remaining cake.
- 19Top with frosting and sprinkles.
- 20Spread rainbow cake joy throughout the land.