2 (13-ounce) boxes of frozen hot soft pretzels, 12 pretzels in all 3 tablespoons unsalted butter 3 tablespoons all-purpose flour 3/4 cup milk, preferably whole 3/4 cup good beer 2 teaspoons brown mustard Sriracha or other hot sauce to taste 4 ounces cream cheese, cut into pieces 2 cups shredded sharp cheddar Coarse or kosher salt and freshly ground pepper to taste Prepare the pretzels according to package directions. Meanwhile, in a saucepan over medium heat, melt the butter. Add the flour and cook, whisking constantly, for 2 minutes.