Using a standing mixer, beat together all ingredients until combined and smooth, about 5 minutes
Set aside
Decorating directions
Using a cake leveler, cut the domes off the cake slices
Place one cake slice onto a 12 inch round cake board
Scoop out 1 1/2 C of the chocolate chip frosting onto the cake slice and smooth evenly with a angled spatula
Place the second cake slice onto the chocolate chip frosting
Repeat steps with another 1 1/2 C chocolate chip frosting
Place the last cake slice onto the second layer of chocolate chip cookie dough
Scoop 2 C of vanilla frosting onto the top of the cake and smooth evenly with the angled spatula
Frost the sides of the cake
Scoop remaining frosting into the piping bag
Pipe dollops of frosting onto the top of the cake
Place a chocolate chip cookie into the frosting dollops
Enjoy with a large glass of milk!