FAVORITE: What’s your favorite candy for Halloween? According to Instacart, the most ordered candy in October of last year was Reese’s Peanut Butter Cups.

Peanut M&Ms were in second place, followed by regular M&Ms and Kit Kats, followed by Snickers and Sour Patch Kids, Hershey’s Milk Chocolate, Milky Way, Twix and Haribo Goldbears.

The tradition of giving candy evolved from an old ritual of offering sweets to the souls of the departed, with manufacturers promoting candy for Halloween in the 1950s, turning it into the candy-centric holiday it is today. Candy corn was invented in the 1880s, originally called “Chicken Feed,” to appeal to the large rural population at the time.

The week leading up to Halloween sees 90 million pounds of chocolate candy sold, surpassing sales during other holidays like Valentine’s Day and Easter.

One-quarter of all candy sold in the U.S. each year is bought for Halloween.

Tootsie Rolls: Named after founder Leo Hirschfield’s daughter’s nickname, Tootsie Rolls were included in World War II field ration kits.

M&Ms: The two “M”s stand for Forrest Mars and Bruce Murrie, who developed the candy, which was originally sold exclusively to American soldiers during World War II.

“Child’s Play” has been the best-selling candy assortment since 1986. It includes Tootsie Rolls, Tootsie Pops, Dots and Fruit Chews.

Kids worldwide have sent over 20,000 letters to Tootsie Roll reporting how many licks it takes to get to the center of a Tootsie Pop. “Licking machines” get to the center in 364 to 411 licks.

Japan has over 350 flavors of Kit Kats, including unique ones like wasabi and chili.

Circus Peanuts are rated the worst Halloween candy, although some people still enjoy them.