For a twist, you can add a handful of chocolate chips or dried fruit like raisins or cranberries to the dough before baking. If you prefer gluten-free cookies, substitute the all-purpose flour with a gluten-free flour blend. For an extra flavorful batch, sprinkle a pinch of cinnamon or nutmeg into the mix. And if you’re looking to up the protein, try adding a spoonful of peanut butter or almond butter to the dough.