Ingredients
Method
- Heat oven to 375°F; grease a 9-by-13-inch dish. Melt 3 tablespoons butter; stir in flour 1 minute. Whisk in milk, mustard, salt, and pepper until lightly thickened.
- Remove from heat; stir in cheddar by handfuls until smooth.
- Layer half the potatoes and sauce in dish; repeat. Cover tightly with foil.
- Bake 55 minutes. Mix crackers with remaining melted butter; uncover and sprinkle evenly on top.
- Bake 15 to 20 minutes more until a knife slides through center and crumbs are golden. Rest 15 minutes.