Perfect Macaroni and Cheese Recipe

INGREDIENTS

slices good-quality white bread, crusts removed, torn into 1/4- to 1/2-inch pieces

8 tbsp

unsalted butter, plus more for dish

5 1/2 cups

milk

1/2 cup

all-purpose flour

2 tsp

kosher salt

1/4 tsp

freshly grated nutmeg

1/4 tsp

freshly ground black pepper

1/4 tsp

cayenne pepper

4 1/2 cups

(about 18 ounces) grated sharp white cheddar

2 cups

(about 8 ounces) grated Gruyere or 1 1/4 cups (about 5 ounces) grated pecorino Romano

1 lb

elbow macaroni