Dairy Queen is celebrating St. Patrick’s Day by bringing back their fan-favorite Mint Brownie Blizzard alongside the new Under the Rainbow Shake. The returning Mint Brownie Blizzard consists of vanilla soft serve mixed with chocolaty brownie pieces, choco chunks, and cool mint syrup. DQ's new Under the Rainbow Shake features a mixture of strawberry flavor and rainbow sprinkles blended with creamy vanilla soft-serve and garnished with whipped topping and more rainbow sprinkles. Both St. Patrick's Day treats are available now for a limited time at participating Dairy Queen locations nationwide.