The return of Starbucks' Pumpkin Spice Latte (PSL) heralds the unofficial start of autumn. Since its debut in 2003, the PSL has become a seasonal icon, a beverage that encapsulates the flavors and feelings of fall. The drink's blend of warming spices—cinnamon, nutmeg, clove, and ginger—evokes nostalgia and a sense of comfort, making it a highly anticipated treat each year.