I never did anything like this before. I made my favorite chocolate cake recipe in a pan that was about 11 x 17 x 2 inches. I doubled the recipe. I drew a picture of one of my daughter’s favorite toy penguins (she has 3). Then I used it as a guide to cut out the body shape of the penguin cake. (It’s like an 8).
I used the leftover cake pieces to make the wings and the feet. I wanted to use chocolate frosting so the black is a mix of milk and semi-sweet chocolate with black food coloring and the white & yellow are white chocolate frosting (the yellow with food coloring).
My one big warning is that the black food coloring stains badly, so don’t use it near anything porous.