In a small, 4 ounce cup of Magnolia Bakery’s banana pudding there are 330 calories, 50 grams carbohydrates, 13 grams fat, 7 grams protein. A large, 12 ounce cup of banana pudding, has triple that, so 1,320 calories, 150 grams carbohydrates, 39 grams fat, 21 grams protein.