Preheat a stove top or outdoor grill to medium high heat. Place corn on hot grill and cook until kernels are tender and lightly charred, about 2-3 minutes per side.
In a medium bowl, whisk to combine mayonnaise, crema, chili powder, sriracha, granulated garlic, salt and 2 tablespoons crumbled cotija cheese.
Transfer corn to the bowl with mayonnaise and crema mixture and spoon to coat completely. Transfer to a serving plate and garnish with remaining cheese, chopped cilantro, a sprinkle of chili powder and lime wedges.