Heat the grill to medium-high heat. Grill the 12 ears corn inside the husk for 45 minutes, rotating halfway through.
Allow the corn to cool so you can handle, then husk the corn. You can also wear gloves if you don't have time to allow them to cool fully.
Place the w1/2 cup butterinto a long dish, roll each corn cob in butter and sprinkle with the 1 tablespoon chile powder. Return to the grill to create a char, anywhere from 10-20 minutes.
Remove and spritz the corn with fresh juice from 6 limes. Place the 1 cup crema mexicana in long dish, roll each corn cob. Sprinkle with the crumbled 1 cup queso cotija or queso fresco, 2 tablespoons cilantro and additional chile powder.
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