Preheat oven to 400 degrees Fahrenheit or fire up the grill to medium heat.
Prep the spicy butter
In a mixing bowl, combine the butter, cayenne pepper powder, cumin, salt, pepper, lime juice (optional), and chopped cilantro (optional). Stir well.
Prep the corn
Tear off the husks and remove the corn silk from the ears.
Cut six pieces of aluminum foil that are large enough to thoroughly wrap each ear.
Place an ear of corn on a piece of aluminum foil, then slather the corn with the spicy butter, coating all sides.
Wrap the ear of corn in the aluminum foil tightly.
Repeat for the remaining ears of corn.
Cook the corn: Oven
Put the aluminum foil wrapped corn ears on a baking sheet, then bake at 400 degrees Fahrenheit for approximately 30 minutes.
Once baked, remove from heat and allow the corn to rest for 5 minutes to slightly cool.
Remove the tinfoil from each ear and serve.
Cook the corn: Grill
Place the aluminum foil wrapped corn on the grill and cook for 20 to 25 minutes, rotating often.
Remove from grill and allow the corn to rest for 5 minutes to slightly cool before serving.
Video
Notes
Cayenne too spicy? Swap it out for generic chili powder. This seasoning is a mix of ingredients, including cumin and chili pepper, so the heat is tempered quite a bit.