You bring the fun, weâve got the âfetti. Birthday Cake has all the magic of a classic golden cake with vanilla frosting and plenty of sprinkles. And with 4g net carbs, 13g complete protein, and no artificial ingredients, itâs pretty much a party in a box. Contains 13g complete protein and 4g net carbs per serving. Does not contain cane sugar, corn syrup, or sugar alcohols.