Be the first to Write a Review Make mustard at home just the way you like it with these easy-to-use kits. Each one contains a dry mix to which you add your favorite beer and cider vinegar for beer mustard. The mustard is fully mixed within just 10 minutes but benefits from a week left in the refrigerator to fully develop its flavor. Each kit comes with an attractive crock for serving. Serve the mustards plain, or experiment by adding your favorite herbs or spices to the mix.