Preheat your oven to 180°C/350°F.
First off, prep your Oreos. For the cake, get your 12 Oreos, place them in a disposable bag and crush them. Set aside.
Prep your Oreos. For the frosting, you'll be using 14 cookies. Take two and ground them finely - to garnish. The rest 12, use a sharp knife and cut them in half.