Ingredients
Method
- Add flour, sugar, cocoa powder, and baking powder to a large microwave-safe mug and stir to combine.
- Add milk and vegetable oil and stir until smooth and no dry streaks remain.
- Stir in crushed graham crackers and chocolate chips.
- Microwave on high for 60 to 90 seconds until the cake is just set in the center — it should still look slightly moist on top.
- Immediately pile mini marshmallows on top and microwave for another 10 to 15 seconds until marshmallows puff.
- Eat directly from the mug while warm.
