If using fresh corn, shuck and grill the ears over medium-high heat until lightly charred (8–10 minutes). Alternatively, use a stovetop skillet or broil in the oven.
For frozen corn, thaw and sauté with olive oil in a skillet until golden.
In a large bowl, combine mayonnaise, sour cream, lime juice, chili powder, smoked paprika, and cayenne pepper. Whisk until smooth.
Cut the kernels off the cob if using fresh corn. Add the corn to the bowl of dressing and toss until evenly coated.
Stir in Cotija cheese, cilantro, and diced jalapeño (if using). Mix well.
Adjust seasoning with salt, pepper, lime juice, or additional chili powder to suit your preferences.
Transfer the salad to a serving dish. Garnish with extra Cotija cheese, a sprinkle of chili powder, and lime wedges.
For a crunchy twist, top with crushed tortilla chips.
Refrigerate for 20-30 minutes before eating for best results.
Enjoy!