The limited-time shake flavors feature vanilla soft serve blended with either strawberry, coffee, or mint syrup and Oreo cookie pieces.
Prices and participating vary but the Oreo Cookie Shakes go for $4.99 near me.
Wienerschnitzel regularly serves an Oreo Cookie Chocolate Shake, which takes vanilla soft serve and blends it with chocolate syrup and Oreo cookie pieces.
Photo via Wienerschnitzel.