Mix shredded chicken with desired amount of BBQ sauce in a bowl then set aside.

Heat a large skillet over medium heat then spray with nonstick spray. Place one tortilla in the bottom of the skillet then sprinkle on a thin layer of shredded cheese. Add 1/4 of the shredded BBQ chicken then add another thin layer of shredded cheese on top, followed by another tortilla. Cook until bottom tortilla is golden brown then flip and cook until golden brown on the second side. Carefully transfer quesadilla to a cooling rack to cool slightly while you cook the remaining quesadillas with remaining ingredients.

Slice quesadillas with a pizza cutter then serve with extra BBQ sauce for dipping.