Unbaked cookie dough balls can be frozen for up to 3 months. Place them on a parchment-lined baking sheet and freeze until solid. Once frozen, remove from the baking sheet and place in a zip-top bag. Label with the date and contents. When you are ready to bake cookies, remove the cookie balls from the freezer, let them sit at room temperature while the oven preheats, and then bake. You may need to add a minute or two to the baking time.