Cake Batter Protein Mug Cake. Is that a little redundant? Maybe, but we don't care. And you won't either after you taste it. It's delicious and packed with protein. A perfect sweet "treat" to curb those cravings. Don't ruin your diet or kill your macros, eat this protein mug cake instead. It's made with cake batter flavored MuscleEgg to give it that extra cake flavor that you'll love. And one of our favorite things about protein mug cake is that there is virtually no mess. You make it in the same dish you eat it from. It's quick. It's easy. It's not messy. Anyone can make this and everyone will love it. Give it a try!