Steam: Place tamales in a steamer basket over simmering water; cover and steam 15–20 minutes (from thawed) or 25–35 minutes (from frozen)
Microwave: Wrap 1–3 tamales in a damp paper towel; microwave 30–60 seconds per tamale (thawed) or 1–2 minutes per tamale (frozen); rest 1 minute
Oven (baking dish): Wrap tamales in foil; add a splash of water to the dish; bake at 325°F / 165°C for 15–20 minutes (thawed) or 25–35 minutes (frozen)
Skillet (covered): Add a small amount of water to a skillet; place tamales in; cover and warm on low heat 8–12 minutes (thawed) or 15–25 minutes (frozen)
Air fryer: Wrap tamales in foil; heat at 300–325°F / 150–165°C for 8–12 minutes (thawed) or 15–20 minutes (frozen)
Thaw before reheating (optional): Thaw in the refrigerator overnight for more even heating, then reheat using any method above