Billie Eilish Shares Her 'Favorite' Cookie Recipe — Made with Costco Peanut Butter!
Photo: Jamie McCarthy/Getty Images; billie eilish/instagram Billie Eilishgave her fans a sweet surprise on Monday. The “Happier Than Ever” star posted a video tutorial on herInstagramStory showing followers how to make peanut butter chocolate chip cookies. The singer noted that she likes to use Costco’s Kirkland Signature organic peanut butter, sharing a snap on her Story of the jar and telling her followers, “(fyi this is my FAVORITE PEANUT BUTTER IN THE WORLD so I always use this for everything)....