If your child is a fan of Oreos, surprise them with an Oreo cookie cake for their birthday. Using a food processor, you can easily crush the cookies and incorporate them into the cake batter. The cake is rich, chocolaty, and filled with crushed Oreo pieces. Top it with a creamy Oreo buttercream frosting and garnish with more crushed cookies for a delightful treat that will satisfy any Oreo lover.