- Place the Oreos in a food processor and process until no cookie chunks remain. It will be like a grainy, sand consistency.
- Transfer the ground up Oreos to a mug.
- Pour the milk over the ground Oreos and stir to combine.
- Place the mug in the microwave and cook for 75-90 seconds, depending on the microwave. The center will be set when it's done cooking.
- Remove the mug and let the cake cool. Top as desired, and enjoy.