Place the Oreos into a food processor, and blend until they become fine crumbs.

Add the crumbs to a mixing bowl, and pour in the milk and baking powder.

Stir until well combined and smooth.

Spread the mixture into well greased, microwave-safe ramekins, mini loaf pans or any other containers you may wish to use. Fill about ½ - ⅔ of the way full.

Microwave for 2-3 minutes, or until a knife inserted into the middle of the cake comes out clean. The cooking time will vary depending on the size of your containers.

Let the cakes cool slightly, then run a knife along the edges to help loosen the cake from the container.

Turn the cake out onto a tray to cool completely.

Spread the icing on your cakes and serve.