No-Bake Crispy Potato Chip Mac and Cheese

Details

Ingredients

• 1 cup elbow macaroni, uncooked
• 1 (8 ounce) bag white cheddar kettle-style potato chips, crushed into medium-fine crumbs
• ⅓ cup finely grated Parmigiano-Reggiano
• 2 tablespoons plain dry bread crumbs
• 1 tablespoon butter
• 4 cups prepared white sauce (see footnote)
• ½ pound shredded extra-sharp Cheddar cheese
• ¼ pound shredded Gruyere cheese
• ¼ teaspoon dry mustard