Step 1

Prepare a grill for medium-high heat.

Step 2

Put the corn in their husks on the grill grate over direct heat. Cover the grill and cook, uncovering the grill and rotating the corn every 5 minutes or so, until the husks are evenly charred, about 15 minutes total.

Step 3

Alternatively, you can grill the corn on the stovetop. Heat a large cast-iron pan or grill over medium-high heat until very hot and smoking, about 5 minutes. Working in batches depending on the size of your pan or grill, put the corn in their husks on the hot pan. Cover the pan with a lid; you can also use a large skillet to cover it. Cook, uncovering the pan and rotating the corn every 5 minutes or so, until the husks are evenly charred, about 20 minutes total.

Step 4

Meanwhile, combine the crema, mayonnaise and lime juice in a medium bowl until smooth. Thin with 1 tablespoon of water if needed. Cover and chill the crema mixture until ready to serve.

Step 5

Pull back the corn husks and silks, leaving the husks attached to the base of the cobs. Using a pastry brush or a butter knife, spread the crema mixture on the corn. Transfer the corn to a platter, sprinkle generously with the Cotija on all sides and season with salt. Serve with reserved lime wedges for squeezing over the corn.