Oreo Cake Make cake mix according to directions and bake in a greased pan. Just before cake is done, start making 2 (4 oz.)packages of Instant Oreo pudding Let mixture sit for about 2 minutes. When cake is still warm, poke holes all over cake (about 1-inch apart. Pour pudding mixture over warm cake.Allow the cake to cool, then put into the fridge about an hour. Once it is set, top with crushed Oreo cookies Also great with yellow or white cake mix with chocolate pudding is a good one.