Blake Lively, laughing, describes her Key Lime Pie recipe as “the most chaotic.” The actress, who graced the cover of ‘s September issue, admits she doesn’t follow exact measurements or instructions when making this summer staple. Instead, she relies on her instincts. “I would love to tell you the amount and the quantity I use for my recipe… but it’s really to taste!” she says. (Spoiler alert: it works, resulting in a picture-perfect pie.) This recipe was originally passed down from her mother. Over time, Lively has added her personal touch, but the core ingredients remain the same, including a generous amount of Cool Whip. “I don’t know what Cool Whip is. I am not going to question it. It’s a genius invention,” Lively declares. While baking, Lively also discusses her highly anticipated movie, ‘It Ends With Us.’ She plays Lily Bloom, a compassionate yet bold young woman navigating the complexities of love amidst her own trauma. The film is based on Colleen Hoover’s novel of the same name, which has captivated millions since its 2016 publication. Lively describes the project as the most immersive she’s been a part of, largely due to the devoted fanbase. “The book Colleen wrote resonated with so many people for so many years,” she says. “It was a great responsibility that I didn’t take lightly.” She also touches on the film’s costumes, which she calls “so expressive and so eclectic,” encompassing everything from Bode to vintage pieces. “It’s some of my favorite wardrobe I’ve ever worn,” Lively enthuses. Watch Lively share her Key Lime Pie recipe, along with her boozy lemonades made with Betty Buzz lemon lime club sodas.