Bring a large pot of salted water to a boil and add pasta to cook.

In a large sauce pan melt butter over medium heat and then add flour.

Using a whisk stir flour and butter together and cook for 1 - 2 minutes.

Add the milk a little at a time (a couple tablespoons) and whisk until completely incorporated before adding more. If you add too much liquid at once, you will get lumps, so take your time until all the milk has been added.

Whisk in the salt, pepper, paprika and dried mustard.

Continue whisking or stiring until the mixture thickens and come to a boil.

Then cut the cream cheese into smaller pieces and add to the mixture. Whisk until melted and incorporated.

Turn off the heat and whisk in the grated cheddar. Stir until fully melted.

Check seasonings.

Drain the pasta and add to the sauce and stir to completely coat the noodles with sauce.

Serve warm.