Shake Shack also doesn’t have a fryer dedicated ... ask for a lettuce wrap or no bun These Vienna all-beef dogs are on the menu for gluten-free diners, as long as they nix the bun.

Unless a restaurant uses different oil fryers for separate menu items, it's easy for cross-contamination to occur. For gluten-free options, it may be best to avoid eating Shake Shack's fries or ...