my macaroni and cheese

Ingredients For my macaroni and cheese

• 8 Tbsp

  or 1 stick unsalted butter, plus more for casserole
• 6 slice

  white bread, crusts, torn into 1/2 pieces
• 5 1/2 c

  milk
• 1/2 c

  all-purpose flour
• 2 tsp

  coarse salt, plus more for water
• 1/4 tsp

  ground nutmeg
• 1/4 tsp

  freshly ground black pepper
• 1/4 tsp

  cayenne pepper
• 4 1/2 c

  grated sharp white cheddar cheese
• 2 c

  grated gruyere or 1 1/4 cup grated pecorino romano cheese
• 1 lb

  elbow macaroni
• 1 pkg

  4-cheese
• 1

  block coby jack cheese