McDonald's UK introduces Grimace Milkshake for 50th anniversary, available Aug 28-Sep 3.

McDonald's UK launches Grimace Milkshake for 50th anniversary, featuring blueberry syrup and a creamy base. Available Aug 28-Sep 3, it joins a summer menu with new desserts, Double Big Mac return, and other popular items like Philly Cheese Stack and Chicken Big Mac. The shake, initially launched in US & Canada, has gained TikTok fame for its unique flavor.