2 gallons of Cake Batter MuscleEgg liquid egg whites. The newest flavor in the MuscleEgg family has quickly become a favorite. If you haven’t tried it yet, you’ll want to make sure you do. And, with 25 grams of protein per serving and 0 grams of fat, it’s nature’s purest form of protein. MuscleEgg liquid egg whites can be kept frozen for up to a year and are good for 3-4 weeks in the fridge after you thaw them out. You can drink it straight like a protein shake because all MuscleEgg products are pasteurized to be extra smooth and easy to drink making it a quick and convenient way to get your daily protein. Or, use it in your favorite recipes, like pancakes, waffles, shakes, burritos or anything calling for eggs!