Heat the butter in a large cast iron skillet over medium heat.
Add the corn and jalapeño. Do not stir. You want the corn to slightly char. After a few minutes, stir and again- let it sit on the hot pan.
Once the corn and jalepeno are slightly charred all around, remove from the heat and allow to cool slightly.
In a large bowl, combine the mayonnaise, sour cream, chili powder, cayenne pepper, chipotle powder, and lime juice.
Add the charred corn and jalapeño, cilantro, and red onion. Stir to combine.
Add 1/4 cup of cotija cheese to the bowl and stir to combine with the rest of the ingredients.
Sprinkle the remaining 1/4 cup of cotija cheese on top of the dip.
Top off the dip with the Tajin seasoning.
Refrigerate, covered, for at least 30 minutes before serving.