Begin by preparing the pasta to al dente. Set aside once it’s cooked until you are ready to combine with the cheese sauce.
Meanwhile, melt the butter in a medium size saucepan. Once melted, add the flour to the buttered and whisk together for a bit, ~3 minutes. Once the flour becomes brown, create the bechamel sauce by adding the milk slowly and whisking together until thick. Add the mustard powder, Worcestershire sauce and buffalo sauce. Taste and salt & pepper for seasoning, as desired.
Now time to add the cheese in batches, whisking together until nice and creamy.
Add the pasta and the buffalo chicken to the cheese sauce and combine together.
Transfer to a greased casserole dish.
Add the Panko Topper (see below) and bake at 350 degrees for 30 minutes.
At the 30 minute mark, turn the boiler on for a few minutes to get the topper browned.
Garnish with chives.
Serve warm & cheers 🍻!