Prep the Corn: Remove husks and brush corn lightly with vegetable oil
Grill the Corn: Cook over medium heat (400–450°F / 200–230°C), turning occasionally until lightly charred
Stovetop Option: Cook corn in a hot skillet over medium-high heat, turning occasionally, until lightly charred on all sides (8–10 minutes)
Make the Topping: In a small bowl, mix mayonnaise, lime juice, garlic, chili powder, and salt
Coat Immediately: Spread the mayonnaise mixture while the corn is still hot so it melts slightly and helps the cheese stick properly
Add Cheese: Sprinkle cotija cheese generously over each ear
Finish and Serve: Add extra chili powder if desired and serve immediately while warm