Step 1

Bring a large pot of lightly salted water to a boil. Cook macaroni in the boiling water, stirring occasionally until tender yet firm to the bite, 8 minutes. Drain.

Step 2

Cut wings and legs off rotisserie chicken. Skin and bone wings and legs; chop or shred dark meat into bite-size pieces.

Step 3

Melt butter in a large Dutch oven over medium heat. Whisk in flour gradually until a thick paste forms. Cook until golden, about 1 minute. Pour in milk, whisking constantly, until thickened and bubbling, about 5 minutes. Continue to cook until sauce is smooth, about 1 minute more. Reduce heat and season sauce with black pepper.

Step 4

Stir Cheddar and Monterey Jack cheese into the sauce until melted and combined. Stir in hot sauce, adjusting to reach desired level of spiciness. Add blue cheese, chicken, and macaroni; mix well to combine.