Move oven rack 6 inches below the broiler. Preheat oven to BROIL setting.
Heat skillet over medium-high heat. Add butter. Once melted, add jalapeños and garlic. Cook for 2 minutes or until garlic is fragrant.
Add corn and cook for 3-4 minutes over medium heat until corn is cooked through. Next, add sugar and stir until mixed through. Remove skillet from heat then add the mayo, miso, ⅓ cup of cheese, and ¼ cup of scallions. Fold to mix and season to taste with black pepper and kosher salt (salt may not be necessary due to addition of miso).
Top with remaining cheese and transfer to the oven. Bake until the cheese is melted, keeping a watchful eye. Do not leave in the oven for too long or the mayo may separate.
Remove from oven and leave to cool for 2 minutes then top with remaining scallions. Enjoy with tortilla chips.
