Extremely Creamy Sriracha Macaroni and Cheese

small sturdy pasta (such as Macaroni, Rotini or the like) I used Rotelli, which is larger

unsalted butter

flour

milk

heavy cream

chicken broth

honey mustard*

sriracha sauce (more or less, depending on how spicy you like it)

large pinch of kosher salt

freshly ground black pepper

really good mild, medium, or sharp shredded cheddar cheese**