Cut corn kernels from cobs and place and place in a non-stick grill pan or frying pan.
Cook for about 8-10 minutes, until just starting to char. Remove to large bowl. Mix in chopped jalapeño, cilantro, and cotija cheese.
In a separate small bowl, stir together mayonnaise, chili powder, cayenne, and freshly squeezed lime juice.
Pour mayonnaise mixture over corn and stir well to combine.
Top salad with additional cheese and cilantro.