No-Bake Crispy Potato Chip Mac and Cheese

By Chef John

3.68 / 5

30min

20min

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