A peanut butter and jelly sandwich is a popular food item made by spreading peanut butter and jelly or jam between two slices of bread. The combination of creamy or crunchy peanut butter with sweet jelly creates a delicious contrast in flavors and textures. This sandwich is often enjoyed as a quick meal or snack, especially among children. The origins of the peanut butter and jelly sandwich date back to the early 20th century, gaining popularity during World War II when soldiers received rations that included peanut butter and jelly. Today, it remains a staple in many households and is often served with a glass of milk.