Preheat your oven to 350 degrees Fahrenheit. Spray a 9 by 13 inch baking dish with cooking spray. Set aside.
Cook the macaroni according to package instructions, making sure to salt the water with 2 teaspoons of kosher salt. When it is finished cooking, drain and set aside.
While the pasta is cooking, melt the butter in a large skillet over medium heat. Whisk in the flour. Make sure it fully combines with the butter and cooks for about 30 more seconds. Then slowly whisk in the half and half and the whole milk. You want to start with just a few tablespoons at a time, adding more once it is absorbed by the roux. Then you can gradually add it more quickly. The whole process should take less than 2 minutes.
4 tablespoons unsalted butter, 1 cup cold half and half, 1 cup cold whole milk, 2 tablespoons all purpose flour
Stir in the buffalo sauce. Add in the salt, paprika, garlic powder, and black pepper. Stir in the cheddar cheese and stir until compltely melted. Try the sauce and add more seasoning to taste.
1/2 cup buffalo sauce, 1 1/2 teaspoons kosher salt, 1/2 teaspoon paprika, 1/2 teaspoon garlic powder, 1/4 teaspoon black pepper
Stir in the chicken and the noodles. Transfer the mixture to the prepared baking dish.
2 cups cooked chicken
In a small bowl, combine the crackers and the butter. Sprinkle over the mac and cheese. Then sprinkle on the blue cheese.
1/2 cup crushed crackers, 1 tablespoon butter
Put the baking dish in the ovan and bake for 30 minutes. Let it rest for 5 minutes before serving.