Protein Mug Cake

"This protein mug cake is quick, easy, and delicious. It's perfect for anyone who needs a little extra protein in their life! This recipe calls for just five ingredients: egg whites, baking powder, vanilla extract, almond milk, and your choice of protein powder (we recommend using a plant-based protein powder). To make this recipe, simply mix all of the ingredients together in a mug and microwave for one minute. Toppings can be added after you remove the mug from the microwave. We recommend adding fresh fruit or nuts."