Melt butter in a large skillet over high heat. While doing so, cut your corn off the cob.
Add your garlic and stir for 15-30 seconds. Then add the corn to the skillet cooking for 10 minutes, stirring as infrequently as you can without letting it burn. (You are looking for the corn to be cooked with golden brown bits and if you stir too frequently you won’t get that nice charring.)
Mix the sour cream, Mexican crema, lime juice, chili powder, and ground cumin while the corn is cooking.
Transfer the corn to a large bowl and pour the dressing over the corn, then stir thoroughly to combine. The heat of the corn will melt the dressing allowing it to coat every kernel.
Top the corn salad with cotija (and chopped cilantro if using) and give it a final stir before serving warm or at room temperature with fresh lime wedges.