Today is National Peanut Butter Day, an unofficial holiday to celebrate the well-loved food that has become a staple in American households.
Whether you're a fan of creamy or crunchy, here are five facts you might not have known about peanut butter.
1) The origin of peanut butter likely goes back to the ancient Aztecs and Incas, who would grind peanuts to make a paste. The process of modern peanut butter creation can be traced back to a series of inventions in the late 1800s and early 1900s. (Source: National Peanut Board)
2) A 12-ounce jar of peanut butter requires approximately 540 peanuts. (Source: National Peanut Board)
3) The first peanut butter and jelly sandwich recipe appeared in the Boston Cooking School Magazine of Culinary Science and Domestic Economics in 1901. The sandwich increased in popularity due to World War II, when it was included in military ration menus. When soldiers returned home, sales of the sandwich fixings increased. (Source: National Peanut Board)
4) A March 2016 survey conducted for peanut butter company Peter Pan showed the average American will eat 2,984 PB&J sandwiches in his or her lifetime, an average of 3.36 per month.
5) The same survey found the average American eats three spoonfuls of peanut butter in one sitting.