This recipe offers the best protein cookie dough in four delicious flavor options — vanilla, cake pop, peanut butter, and chocolate. Each variant combines protein powder with oat and almond flours, sugar substitutes, and other flavorful ingredients to create a thick, satisfying cookie dough that's perfect for a guilt-free treat. No baking required, this chilled cookie dough is rich in protein and perfect for snacking or making cookie dough bites.