Creamy 4 Cheese Brie and Buttery Ritz Cracker Mac and Cheese

Bahan-bahan (6 porsi)

• 7 tablespoons unsalted butter (divided)
• 1 clove garlic (minced or grated)
• 1 1/2 cups crushed Ritz crackers (about 1 sleeve)
• 1 pound elbow pasta
• 1/4 cup flour
• 3 cups warm milk (I used 2%)
• 1 1/4 cups sharp white cheddar cheese (shredded)
• 1 cup fontina cheese (shredded (add an extra 1/4 cup...if you want!))
• 1 1/4 cups havarti cheese (shredded)
• 4 -6 ounces Brie (rind removed and chopped (I surely used 6 ounces))
• 1/4 teaspoon mustard powder
• 1/4 teaspoon cayenne pepper
• 1/4 teaspoon salt
• 1/2 teaspoon pepper