Grill corn evenly until all sides brown a bit (about 10-15 minutes).
Mix the sour cream and mayo together. Brush the cooked corn liberally with the mayo/sour cream mixture.
Roll each ear of corn in crumbled cotija cheese - this is kind of a Mexican feta, (you can sub for feta if you want)
Season with ancho chili powder - or regular chili powder if you have that handy.
I sprinkled mine with chopped fresh cilantro for presentation and because we love cilantro!! (Totally optional also - some people HATE cilantro)
You can also squeeze lime juice over the top for an extra zing - but we went without that.
