No, Shake Shack does not currently or has ever offered vegan milkshakes in their stores and they are not planning to serve any time soon. All of Shake Shack’s milkshakes include eggs and dairy milk which are not suitable for vegans. Shake Shack does have a selection of vegan drinks on their menu though including their shack-made lemonade, fresh brewed iced tea, fountain soda, and also some of their alcohol selections, but this will differ from store to store