Protein is an important nutrient found in meats, fish, nuts and dairy that helps build and maintain muscle tissue. According to the Harvard School of Public Health, a lack of protein can lead to serious health issues, including stunted growth, a decrease in immunity and weakened cardiovascular and respiratory systems. In severe cases, protein malnutrition can even result in death. Many people choose to supplement their diet with protein bars, which are sometimes very expensive. You can make your own protein bars at home to reap the benefits of protein without spending a lot of money.
Mix 1 cup of protein powder and 1 cup of flour in a large bowl. There are many different brands and flavors of protein powder available in stores. You can use any that you prefer. If you don't want to use flour, you can use whole oats ground in a food processor instead.
Add any spices that you like to the dry ingredients. You can add cinnamon, nutmeg, allspice or any other spices that you enjoy. Some people also like to incorporate dried fruits or chopped nuts. It is up to your imagination and personal taste.
Add about 1 cup of peanut butter to the mix and stir to combine. The dry ingredients should all be incorporated and resemble sticky bread dough. Add peanut butter by the teaspoon if your dough is too dry. You can also experiment with using different nut butters, such as almond butter or soy nut butter.
Line a six-inch by eight-inch baking pan with wax paper and then spoon the protein bar batter into the pan. Use the back of a spoon to smooth the batter.
Put the pan into the freezer for about two hours. Once the batter is firm, you can cut it into bars whatever size you like. Store the bars in the freezer or refrigerator and enjoy.