Shuck the corn and remove the silk
Bring a large pot of water to a boil
Add the corn and cook for 5 to 7 minutes
Remove the corn and let it drain briefly
Brush each ear with mayonnaise or Mexican crema
Sprinkle with crumbled cotija cheese
Dust with chili powder or tajÃn
Squeeze fresh lime juice over the corn
Add chopped cilantro if desired
Serve immediately