Begin by placing 4 Oreo cookies in a large microwave-safe mug. Pour in a couple of tablespoons of milk, then use a fork to mash the Oreos until they're well combined.

Next, sprinkle in 3 tablespoons of all-purpose flour and half a teaspoon of baking powder into the Oreo mixture. Stir energetically with your fork until the batter is smooth and free of lumps.

Place the mug in the microwave and heat it on high for 60-90 seconds, checking at the one-minute mark to ensure the cake rises and sets on top.

Once your Oreo Mug Cake is done, carefully remove it from the microwave and add your choice of toppings like whipped cream or chocolate chips.