When I'm craving a rich, chocolaty dessert, but don't want to commit to baking an entire cake, pie or something in between, I whip up these Microwave S'mores Mug Cakes. You only need a small amount of each ingredient to create a decadent chocolate, graham cracker, marshmallow treat with a twist that you can make in the microwave and eat right away. The best part? Since each cake is made in one mug there's practically no clean up, to boot.
Microwave 1 tablespoon of the butter in a microwave-safe mug until melted, about 20 seconds. Add the graham cracker crumbs and stir to combine. Transfer half of the crumbs into another microwave-safe mug and press the crumbs down into the bottom of each mug.
Microwave the remaining 3 tablespoons butter in a microwave-safe bowl until melted, 20 to 30 seconds. Add the milk and egg and whisk to combine. Add the flour, sugar, cocoa powder, baking powder and a pinch of salt and whisk until smooth.
Divide 1/4 of the batter into each mug and top each with 8 mini marshmallows or 1 large marshmallow. Divide the remaining batter into each mug and top each with 8 mini marshmallows or 1 large marshmallow.
Microwave the mugs for 1 minute to 1 minute 15 seconds, watching towards the end to make sure the cakes don't overflow.