Panera macaroni and cheese

I know, more macaroni and cheese but this is by far, the kids' favorite version.

From the Panera website.


1 (16-ounce) package of rigati pasta (or other small pasta shells)
¼ cup butter
½ cup all-purpose flour
2½ cups  milk
6 slices white American cheese, chopped
1 cup (8 ounces) shredded extra-sharp white Vermont cheddar
1 tablespoon Dijon mustard
2 tsp Worcestershire sauce
1/2 tsp garlic powder
1 teaspoon kosher salt
¼ teaspoon hot sauce

Prepare pasta according to package directions.
Melt butter over low heat.
Whisk in flour and cook 1 minute, whisking constantly.
Gradually whisk in milk; cook over medium heat, whisking until mixture thickens and bubbles.
Remove from heat.
Add cheeses, mustard, salt, and hot sauce, stirring until cheese melts and sauce is smooth.
Stir in pasta and cook over medium heat for 1 minute (or until thoroughly heated).