9 High-Calorie Foods! 6 calorie-filled foods that’ll make eating enough a breeze. If you can manage to incorporate these 9 foods, or a variation of them, into your diet regularly, you’ll have no problem moving the scale. 1 serving of peanut butter contains about 200kcal. That doesn’t include the bread you spread it over; that’s another 150kcal. Multiply that by two because no one eats just one peanut butter sandwich, and you’ve got a 700kcal of creamy deliciousness in a matter of minutes.