"I had a lot of chocolate chip cookies left over after Christmas, so I made this cake using the idea of a graham cracker cake. Putting everything into a food processor made it quick to make and clean up. It turned out to be a tasty treat topped with whipped cream. It is very moist and soft. Adding coconut or nuts gives it texture. Serve topped with whipped cream or dusted with powdered sugar."
Preheat oven to 325 degrees F (165 degrees C). Grease a 9x13-inch cake pan or baking dish.
Process chocolate chip cookies in a food processor until completely crumbled. Add sugar, flour, baking powder, and cinnamon to cookie crumbs; pulse to combine. Add butter, eggs, and vanilla to cookie mixture; process until blended.
Pour milk into cookie mixture while food processor is running; blend until batter is evenly mixed. Pour batter into prepared pan.
Bake in the preheated oven until a toothpick inserted into the center comes out clean, about 40 minutes. Cool in the pans for 10 to 15 minutes.