Baskin-Robbins said participating shops nationwide will be offering a free sample of its Mint Chip 'n Oreo Cookies milkshake on St. Patrick’s day — Saturday, March 17 — from 3 p.m. to 7 p.m. The milkshake is made with two of its most popular flavors, mint chocolate chip and Oreo cookies 'n cream, blended into a rich, minty treat.

The offering is just one of Baskin-Robbins' featured milkshake flavor combinations. Guests are encouraged to become "milkshake mixologists" and create new milkshake flavors all their own by blending two of their favorite ice creams into one tasty shake, the company said. They may also share their "milkshake mixology" combinations with Baskin-Robbins on social using the hashtag #BRShakeItUp.