Sandwiches made with Peanut Butter and Jelly A school lunch wouldn't be complete for a lot of us without the peanut butter and jelly. It took only 20 minutes to make and the sandwich was delicious when it was at room temperature, and the combo of grape jelly and peanut butter was delicious. Even though they're often typically associated with children doesn't mean that you shouldn't be able to enjoy the same pleasures even as an adult!