Low Protein Cinnamon Buns for the PKU diet. If I need to bribe my kids, cinnamon buns are the way to go. Who does not love the heavenly smell and taste of cinnamon? These really are easy to make and the dough freezes well, so you can pop them right into the oven (don’t defrost) whenever you need a pick-me-up. To access this recipe, please register or sign in to our free website. Your contact information will not be shared with any third parties.