INGREDIENTS
16 oz
Elbow macaroni
1/2 cup
All-purpose flour
1/4 tsp
Black pepper, freshly ground
1/4 tsp
Cayenne pepper
2 tsp
Kosher salt
1/4 tsp
Nutmeg
6
slices White bread, good-quality
8 tbsp
Butter, unsalted
4 1/2 cups
Cheddar, grated sharp white
2 cups
Gruyere, grated
5 1/2 cups
Milk