Cookie Monster Cake

"My cookie monster cake is delicious and bursting with tons of cookie flavor. It looks adorable, too, and is perfect for Sesame Street birthday parties. It would even make a great smash cake for a first birthday party. If you have a cookie fan in your house, you need to save this recipe! Why This Cake Is a Must Try Authentic Cookie Flavor: I used cookie dough and oreo buttercream to help this cake taste more like a cookie. Easy Decorations: No fancy piping or fondant work is required; we'll make Mr. Cookie Monster using Oreos.  Showstopper: Everyone's draw will drop when you bring out this cake."