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1.
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Preheat oven to 350 F and grease a large casserole dish (I used a large oval baker).
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2.
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Bring a pot of water to a boil, throw in a dash of salt, and add the pasta.
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Cook until al dente (according to package instructions for al dente).
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Drain and set aside.
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3.
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In the meantime, in a large skillet over medium high heat, melt 2 tablespoons of butter and stir in the chicken and garlic.
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Cook for a couple minutes then add 1/4 cup of the hot sauce and mix it all together until well combined.
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Put the chicken mixture in a bowl and set aside.
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Quickly rinse out your skillet and return to stove.
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4.
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Melt 2 tablespoons of butter in the skillet over medium heat and whisk in the flour and mustard powder until smooth.
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Then whisk in the milk and cream.
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Add the remaining 1/2 cup of hot sauce and stir until thick.
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Whisk in the cheddar and pepper jack cheese until melted and smooth then whisk in the sour cream until all combined.
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5.
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Spread half of the macaroni in the bottom of the prepared dish then top with the buffalo chicken mixture and then add the remaining macaroni.
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Pour the cheese sauce evenly on top.
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6.
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Put the remaining 2 tablespoons of butter in a small bowl and heat it for about 30 seconds in the microwave.
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If its not melted after 30 seconds, heat it for a few seconds longer.
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Stir in the panko and bleu cheese then sprinkle the mixture over the top of the macaroni.
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7.
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Bake for 30-40 minutes or until bubbly.
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Let it rest for 10-15 minutes before serving.
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Adapted from Tidy Mom.