What is grimace shake?

The Grimace Shake is a limited-time menu item that was introduced as part of a promotion by McDonald's to celebrate the character Grimace's birthday. Released around mid-2023, the shake featured a unique purple color, in line with Grimace's signature hue, and was said to have a berry-like flavor, though McDonald's often doesn’t disclose specific flavor combinations. The promotion gained significant attention on social media, with many people sharing their experiences and sometimes humorous reactions to trying the shake. It played into a wave of nostalgia and character-centric marketing that McDonald's has been embracing.