Collabfest has made a comeback in 2025 and for the first time ever, we’re delighted to have secured a limited amount of these one-off collaboration brews for brewdog.com. This beer is a 6% Pastry Sour brewed in collaboration with Yonder Brewing. A sweet, tart and downright irresistible pastry sour balancing deliciously zesty lemon and a hint of sweet, chewy meringue. .