Step 1
Mix butter and 2 Tbsp. chaat masala in a small bowl to combine. Step 2
Prepare a grill for medium-high heat. Rub corn with oil and grill, turning often, until lightly charred all over and tender, 8–10 minutes. Step 3
Brush corn with chaat masala butter and arrange on a platter; top with Cotija cheese if desired. Step 4
Dip one side of each lime wedge into some chaat masala and serve alongside corn for squeezing over.