In a small bowl mix mayonnaise, minced jalapeños, cumin, paprika, garlic powder, chili powder, and sugar to make the quesadilla sauce.
Heat a large skillet over medium heat and melt a small amount of butter.
Place one flour tortilla in the skillet and spread a thin layer of sauce on it.
Add sliced chicken evenly over the tortilla.
Sprinkle shredded Monterey Jack cheese on top of the chicken.
Place another tortilla on top to form a quesadilla.
Cook for 2–3 minutes until the bottom tortilla becomes golden and crispy.
Carefully flip the quesadilla using a spatula.
Cook the other side until cheese is fully melted and tortilla is crispy.
Remove from skillet, slice into wedges, and serve warm.