Step 1

Add all ingredients into an 8 oz mug that is safe for cooking at high heat. Mix with a mini whisk until batter is completely smooth.

Step 2

Place mug into air fryer basket. Close air fryer and set cooking temperature to 350°F. Cook for about 12-13 minutes or until cake is cooked. Remove mug from air fryer and let cake cool a few minutes at room temperature.

Step 3

If desired, top with frosting or chocolate syrup. Eat directly from mug with a spoon once cake is cool enough to eat.