Keep tamales frozen until ready to cook
Remove any plastic wrap or packaging
Steam in a steamer basket over boiling water
Cover tightly with a lid
Steam for 25 to 35 minutes if thawed
Steam for 45 to 60 minutes if frozen
Check that the masa is hot and pulls away from the husk easily
Add more water if needed during steaming
Let rest for 5 minutes before serving
Reheat in the microwave by wrapping in a damp paper towel and heating in short intervals
Reheat in the oven by wrapping in foil and baking at 350°F until heated through
Reheat in the Instant Pot by steaming on a trivet with water for about 15 to 20 minutes