First, you will need to cut your bread into cubes and spray the inside of the mug of your choice with your favorite cooking spray.

In a separate bowl or mug, combine the egg, milk, cinnamon, and vanilla and whisk together until it’s well mixed.

Pour the mixture into the mug with the squared bread, and squish your bread until it is soaked. Place in the microwave for about 1 1/2 minutes or until the egg is totally cooked.

In a small bowl or large mug, mix powdered sugar with your milk or water. You’re going to need the mixture to be runny, but not too runny. Once you have the desired consistency, pour it over your French toast while it’s nice and hot.