Place one layer of cake on a cake plate/stand. Scoop ⅕ (about 1 cup) of frosting on top of the layer and use an icing spatula to spread it around. Repeat with 3 layers.
For vegan, use a non dairy gluten free flour, vegan baking sticks, vegan chocolate chips and sprinkles and only use a vegan heavy cream, or use my vegan ganache recipe.