Cook the mac and cheese following the package instructions.
Spread the tortillas on a clean surface.
Heat a 10-inch pan over medium heat.
On one side of each tortilla, sprinkle about 2 tablespoons of shredded cheese.
Scoop around 1/4 of the prepared macaroni and cheese onto the cheese layer of each tortilla.
Evenly distribute a tablespoon of diced green chiles over the mac and cheese.
Add the chopped bacon on top of the mac and cheese in each tortilla.
Sprinkle 2 more tablespoons of shredded cheese over the bacon layer.
Fold each tortilla in half, keeping all the ingredients on one side.
In the heated skillet, melt 1 tablespoon of butter. Place 2 folded quesadillas in the pan, positioning the folded edges against each other.
Cook for 2-3 minutes until the bottom is golden brown. Flip them and cook the other side for another 2-3 minutes until golden.
Transfer the quesadillas to a cooling rack while you prepare the remaining ones.
Cut each quesadilla in half and serve.