When I first saw this video for Southern Living's four-ingredient peanut butter cookies, I couldn't conceal my skepticism. How could you possibly make cookies from peanut butter, egg, sugar, and vanilla extract alone?! It seemed suspiciously too easy, but I had to try it out! With so many friends and family members on gluten-free and dairy-free diets, I figured if the recipe did work, I could make a lot of people happy.
