Fans of the seasonal Starbucks Pumpkin Spice Latte can expect the beverage to return to stores on August 30, 2022, and here’s what you probably never knew about the PSL's origins. The drink was invented by Peter Dukes, a former Stanford University athlete and economist who joined the Starbucks team in 2001.

Dukes formulated the PSL in the Starbucks Liquid Lab, a space in the company's headquarters stocked with ingredients and equipment for creating new drinks. To perfect the formula, the team consumed a lot of pumpkin pie and espresso to see how the flavors interacted; they also nearly named the drink the "Fall Harvest Latte."

The PSL is now Starbucks' most popular seasonal beverage of all time — Dukes says "It’s taken on a life of its own" — but when it launched in 2003, it was only available in 100 select locations. Today, over 200 million Pumpkin Spice Lattes have been served, and Starbucks even runs an official PSL Instagram account.