Emperor’s Kitchen Traditional Kuzu is a culinary superfood. Kuzu is traditionally used in Japan and China as a culinary and confectionary thickening starch as well as a valued medicinal remedy. Kuzu’s mild flavor makes it the perfect thickening agent for sauces, gravy, glazes, soups, stews and even cake icings and pudding. You can also use kudzu as a coating for frying your favorite vegetables, fish, tofu or tempeh.