Shamrock Shake Treats Return at McDonald’s

The unmistakable minty hue of McDonald’s Shamrock Shake is returning nationwide on February 21 and it’s bringing along the OREO Shamrock McFlurry.

Of course, this is a limited time only release, so act fast and indulge in the relaxing vibe of the green treat. But besides the triumphant return of the Shamrock Shake, McDonald’s has revealed the secret behind its undeniable color: #cbf2ac, the hex code for it.

In the 50 plus years that McDonald’s has been serving up the Shamrock Shake, they’ve never given away the secret ingredient to it, until now. Check out the graphic below to see the secret to its sauce.