Lobster Macaroni and Cheese Ingredients Vegetable oil 1 pound cavatappi or elbow macaroni 1 quart milk 8 tablespoons (1 stick) unsalted butter, divided 1/2 cup all-purpose flour 12 ounces Gruyere cheese, grated (4 cups) 8 ounces extra-sharp Cheddar, grated (2 cups) 1/2 teaspoon freshly ground black pepper 1/2 teaspoon nutmeg 1 1/2 pounds cooked