This Easy Mezcal Shandy Recipe is naturally gluten-free only if all packaged ingredients are certified gluten-free. Mezcal and tequila are typically gluten-free when distilled properly, but always verify labels for safety. The Stiegl Radler must be checked, as some radlers or flavored beers may contain gluten depending on production methods. If gluten is a concern, substitute the radler with a certified gluten-free citrus soda or gluten-free radler alternative.