It shouldn't be all too surprising that a bowl of creamy butter and parmesan-laden noodles would be fattening. At least in Italy, the portion sizes are quite reasonable. But in the US, this restaurant favorite could easily have upwards of 1,200+ calories and 75 grams of fat in one bowl. Not to mention, many chefs add cream for more richness. We recommend saving this indulgence for very rare, special occasions.