These Leftover Halloween Candy Cookies also freeze well, which is a great option to use up that candy and not have to eat more sweets immediately. You can can make a whole batch and store pre-made dough balls and bake from frozen for an extra 1-2 minutes, or store baked cookies in an airtight container or freezer bag after cooling. I suggest adding parchment between layers to avoid cookies from sticking to one another.