Preheat the oven to 350 degrees F. Spray a 9x13 baking dish with nonstick cooking spray. Set aside.
Cook the pasta according to the package instructions, making sure to salt the pasta water. Drain the pasta in a colander when it's done cooking but do not rinse it!
1 box (16 oz) cellentani pasta
In a large pot, over medium heat, add the Velveeta queso blanco, milk, cumin garlic powder, and salt. Let it cook, while stirring frequently, until the velveeta cheese has fully melted.
16 oz Velveeta Queso Blanco, 2 cups whole milk, 1 teaspoon ground cumin, 1 teaspoon garlic powder, ½ teaspoon kosher salt
Stir in the shredded Pepper Jack cheese and the diced green chilies. Continue to cook until all of the cheese has melted and the mixture is smooth and creamy.
1 block (8 oz) Pepper Jack cheese, 1 can (4 oz) diced green chilies
Stir the cooked and drained pasta into the cheese sauce until it's mixed well and all the pasta is covered in the cheese sauce. Transfer the mac and cheese to the prepared baking dish.
Sprinkle the queso quesadilla cheese over top.
8 oz queso quesadilla cheese
Bake for 25-30 minutes or until the cheese is golden brown and the sides are bubbly.
Sprinkle the top with chopped fresh cilantro (if using), serve & enjoy!
chopped fresh cilantro