Rainbow Clown Cake

Step 1
Preheat an oven to 350 degrees F (175 degrees C). Grease and flour two 8-inch round cake pans.

Step 2
Beat the egg whites with an electric mixer until frothy, about 1 minute. Add the cake mix, water, and canola oil; continue beating for 2 minutes on medium speed.

Step 3
Divide the cake batter into six separate bowls. Use a toothpick to scoop a dab of food coloring into one bowl of batter and stir; add more food coloring, if necessary, to reach the desired shade. Repeat with the remaining colors and bowls of batter.

Step 4
Scoop spoonfuls of batter into the prepared pans, alternating the colors. Use a toothpick to gently swirl the colors for a marbled effect.

Step 5
Bake in the preheated oven until a toothpick inserted into the cake comes clean, about 30-35 minutes. Cool in the pans for 10 minutes before removing to cool completely on a wire rack.