Heat olive oil over medium heat in a nonstick skillet. Add onion and cook until soft.
In a medium bowl, stir together onion, chicken, bbq sauce, and corn.
Melt 1/2 tablespoon of butter in nonstick skillet over medium heat. Place 1 tortilla in skillet. On half the tortilla, sprinkle 1/4 cup of cheese, 1/4 of the chicken mixture, followed by another 1/4 cup of cheese. Fold the tortilla over the filling.
When golden on the bottom, flip over and continue to cook until cheese is melted.
Repeat with remaining 3 tortillas.Serve with sour cream and chopped fresh cilantro.
Notes
To make spicy use a spicy bbq sauce or add 1/4 teaspoon of cayenne pepper to the filling.Nutritional info is provided as an estimate only and can vary based on brands of products used.