Crush the Golden Oreo cookies into fine crumbs using a ziplock bag and rolling pin or a food processor.
In a microwave-safe mug, combine the crushed cookies, milk, baking powder, flour, sugar, and melted butter.
Stir well until a smooth batter forms.
Microwave the mug on high for 1-2 minutes, or until the cake is fully set.
Allow the cake to cool slightly before serving.