*If making these ahead of time, once the oatmeal cups have cooked and cooled (at least 15 minutes), wrap them individually in saran wrap, place them in a freezer-safe container, and freeze. You can heat them up in the oven (at 350 for 7-8 minutes) or in the microwave.
Or, you can store them in the refrigerator for about a week, and heat them up in the microwave or oven.