Heat a large skillet over medium-high heat. Add butter and allow it to melt.
Add corn kernels and cook for 5–7 minutes, stirring occasionally, until lightly charred.
Transfer the corn to a mixing bowl and let it cool slightly.
Stir in mayonnaise, crema, lime juice, chili powder, smoked paprika, and half of the Cotija cheese.
Mix until well combined. Season with salt and pepper to taste.
Spoon the mixture into serving cups, sprinkle with the remaining Cotija cheese, extra chili powder, and chopped cilantro.
Serve warm with lime wedges on the side for extra zest.