Baked Macaroni and Cheese

Bahan-bahan (8 porsi)

• Kosher salt
• 1 pound elbow macaroni
• 1 stick unsalted butter (plus melted butter for brushing)
• 1/4 cup all-purpose flour
• 2 teaspoons mustard powder
• 1 teaspoon Worcestershire sauce (optional)
• 1 teaspoon hot sauce
• 1/4 -1 teaspoon cayenne pepper (I used 1 teaspoon)
• 1 quart whole milk (4 cups)
• 3 1/2 cups havarti cheese (grated)
• 5 1/2 cups sharp cheddar cheese (shredded)
• 1 sleeve butter crackers (crushed (about 35 crackers), such as Ritz)
• 2 tablespoons grated parmesan cheese (optional)