1 cup American cheese, shredded or cut into small pieces
1 teaspoon mustard powder
½ teaspoon onion powder
½ teaspoon garlic powder
½ teaspoon paprika
¼ cup (½ stick) unsalted butter, cut into small cubes
salt, to taste
pepper, to taste
Directions
Lightly grease the inside of a large slow cooker.
Place the uncooked macaroni, whole milk, evaporated milk, cheddar cheese, American cheese, mustard powder, onion powder, garlic powder, paprika, and cayenne (if using) inside the cooker.
Stir to combine, making sure the macaroni is mostly covered.
Dot the top with butter pieces.
Cover and cook on low for 1 to 1 ½ hours, stirring and checking for doneness every 30 minutes. At the end of the cooking time, stir generously to create a smooth sauce.
Season with salt and pepper to taste. Garnish with fresh parsley, if desired.