Peanut Butter One of the easiest and most delicious ways to gain healthy weight is by spreading some peanut butter on bread. Salty, soft peanut butter on toast has nearly 200 calories, but also provides a high protein boost that your body can use in a productive way. Cheese The best thing about cheese is that you can put it on practically anything. The high-fat content in most types of cheese will definitely help you increase your weight, but cheese also contains necessary vitamins and minerals , as well as a good amount of protein, which will help you gain weight in a healthy way. Whole Milk One of the easiest ways to gain a bit of extra weight is to get rid of your skim milk and replace it with high-fat content whole milk. Basically, the fat is left in, adding only 60 extra calories per serving, but also keeping a lot of extra vitamins and healthy fats in your milk. It is an easy...