Combine all ingredients in a small bowl and stir until combined.
Scrape into a large mug and microwave for 90 seconds (time could vary depending on your microwave). Mixture will puff up and then go back down,
Optional garnish or add-ins include Coconut flakes, shaved chocolate, chocolate chips, caramel, whipped cream or ice cream
Notes
You can mix the mixture directly in your mug however, I like to scrape it in from a small mixing bowl so the batter isn't all over the mug before it cooks.