Preheat the oven to 350°. Place cake mix in the bowl of a stand mixer. Add buttermilk, vegetable oil, and eggs and blend for two minutes on medium speed.
Pour cake batter in a well greased bundt pan. Bake 35-40 minutes, or until a toothpick inserted comes out clean. Allow to cool then invert onto a plate.
Divide frosting into three bowls and add a different color of food coloring to each. Heat one at a time in the microwave for 10 seconds to make it nice and smooth. Place in a plastic sandwich bag and cut a tiny hole in one of the corners. Drizzle frosting over the cake. Repeat with remaining two colors. Add eyeballs all over the cake immediately after adding the frosting. Serve and enjoy!