Step 1

Cook the pasta according to package directions. Drain and set aside.

Step 2

In a small 1-quart saucepan, melt the butter over medium-high heat.

Step 3

Add the flour and cook, stirring for 1 minute.

Step 4

Whisk in the milk and cook, whisking constantly for 1 to 2 minutes until the mixture thickens and there are no lumps.

Step 5

Stir in the cheese, the dry mustard, and the salt and continue stirring until the cheese has melted.

Step 6

Remove from the heat and stir in the pasta. Best if enjoyed immediately.The macaroni and cheese will be very creamy and will thicken even more as it cools.