Mac & cheese might not be something you'd traditionally make for Christmas Eve dinner, but this truffled-up, four-cheese version is a worthy contender. The combination of gorgonzola, goat cheese, fontina and parmesan renders the dish extremely rich and creamy (as most holiday meals should go), while the black truffle butter and truffle oil give it a luxurious, unbeatable taste. Balance with a side salad to save your Christmas calories.