28. Ice Cream
Calories per serving: 200+, varies by type of ice cream
Some might say that ice cream is not a very healthy choice, BUT like with everything else, if you indulge every other time and not have it 3 times a day, then you should be absolutely fine.
It's delicious, it's dense in calories and it's perfect for hot days.
Also, you can always opt for Organic Ice Cream if you want to gain weight in a healthier manner.