Preheat grill or grill pan to high. Grill corn until kernels are charred and slightly softened, 10 minutes. Once cooled, cut kernels off the cob and set aside.
In a large skillet over medium-high heat, melt butter. Whisk in flour, 1 tablespoon at a time, and let cook until bubbly. Whisk in milk, cream cheese and Monterey Jack. Add jalapeño, if using. Cook for another 3 minutes.
Stir in corn kernels and toss to coat, then season with salt and pepper to taste.
Garnish with cilantro and serve.
Recipe by 5* trending recipes with videos at https://food.theffeed.com/2020/05/20/grilled-creamed-corn/