Step 1

Heat water in a large pot on high until it reaches boiling point. Generously add salt to the water. Once it begins to boil, add pasta and cook according to package instructions.

Step 2

As the water is warming up, make the sauce. Heat a pot over medium heat and add butter. Once the butter is melted, whisk in the flour until a paste forms. Make sure to have the milk nearby because you will want to have it ready. Whisk in milk and heavy cream. Let it simmer for 8-10 minutes.

Step 3

Slowly add in the chunks of cheese in small increments, whisking after each addition. You don't want to add it in all at once or the mixture may clump. Add in salt, pepper, and dried mustard. Let the cheese melt and once the sauce has thickened, add the drained pasta. Taste for seasonings.

Step 4

Serve warm.