- In a blender, crush the Oreo cookies to a fine powder. Now, add milk, sugar, baking powder and blend well. Adjust the quantity of milk in a way it is of pouring consistency. Now, take a microwave-safe bowl and pour the mixture on it. Microwave on high for 20-25 minutes Gradually increase the baking time until the cake bakes perfectly. Take it out of the dish carefully, place on a platter and pour chocolate syrup,whipped cream or garnish with chopped nuts.