I used a boxed cake mix in white and made two 9" round cakes with it. I made a buttercream frosting to put in-between the cake layers. The fondant recipe I got here.
I made 2 batches of fondant for this cake, the recipe makes a lot though, so if you're just gonna use 1 box of cake mix, 1 batch, divided, will do you just fine.
For your fondant, be sure to use the professional gel food coloring. You will use an entire container of red food coloring for 1 batch of fondant in the above recipe. Be sure to get the NO TASTE red or your fondant will taste bitter as the entire cake is draped in the red fondant.
Note the recipe calls for a 13.5 oz bag of marshmallows. The bag to your left is a 10 oz bag, yeah, who knew? Luckily I had 2 bags of marshmallows and a kitchen scale
you DO NOT want to be kneading all that red in, add it to your melted marshmallow mix ahead of time
Real vanilla - do not accept substitutes. Use a couple cap fulls to flavor your fondant
Make sure to have a lot of Crisco on hand. Here is my well crisco'd mixing bowl
I used an entire 2 lb bag of powdered sugar for 1 batch of fondant
I turned my breakfast bar into a work table - just put the Crisco right on it - cleans up well with a wet cloth and some Dawn. Here is the completed red fondant after kneading.
Since you'll only use the black for eyes and mouth, it's easiest to knead it into the prepared fondant. A good way to add in your color is with a toothpick as shown. You'll use more black than you would think, so make sure you have a 1/4 oz on hand or so.
Here are my 4 fondant colors for the cake - red, orange, black and white.
The completed cake. For the eyes and nose I used a drinking glass to cut 3 equal sized circles, the pupils I used a prescription bottle cap and the mouth was a combination of small pot lid and free-hand paring knife carving.
I did have to do some patching with the fondant - my first time doing it. For the writing I used the edible color markers