- 1/4 cup all-purpose flour
- 1/4 cup brown sugar
- 3 1/2 tablespoons cocoa powder
- 1 teaspoon hot cocoa mix
- 1/2 egg, beaten
- 3 tablespoons chocolate milk
- 3 tablespoons vegetable oil
- 2 tablespoons chocolate chips (optional)
- 1 splash vanilla extract
- Mix flour, brown sugar, cocoa powder, and hot cocoa mix together in a large microwave-safe mug. Stir egg into flour mixture. Mix chocolate milk and vegetable oil into flour mixture until batter is smooth; stir in chocolate chips and vanilla extract.
- Cook in the microwave on high until cake rises slightly and a toothpick inserted in the middle comes out clean, about 3 minutes.