Preheat your oven to 350°F (175°C). Line or spray a 12-cup muffin tin.
In a large bowl, mix together the cake mix, protein powder, egg whites, applesauce, and almond milk until smooth.
Divide the batter evenly into 12 muffin cups (about ¾ full).
Bake for 18–22 minutes or until a toothpick comes out clean.
Let cool completely before storing. Store in the fridge up to 5 days or freeze for later!
