Step 1

In a microwave-safe mug (that can hold at least 12 oz of liquid), add all ingredients. Mix with a small whisk until batter is smooth and completely combined with no egg streaks remaining.

Step 2

Cook cake in the microwave at full power for about 1 minute. Be careful to not overcook the cake because that will cause the cake to be dry when it cools. Allow the cake to cool a few minutes before eating. The cake is a little plain on its own, so I recommend topping with a sugar-free chocolate spread or syrup or sugar-free Nutella spread.