Peanuts are planted in April and harvested 120-160 days later. They are roasted, shelled, and ground into peanut butter. Peanut butter is most famously used in PB&J sandwiches but also in many baked goods. A classic recipe is for peanut butter cookies, which are made by creaming butter and sugars together before mixing in peanut butter, eggs, and dry ingredients. Peanut butter festivals celebrate the popular spread with activities like cook-offs and contests.