Xanthan gum is a type of complex carbohydrate that is frequently used in food production, as it helps to thicken and stabilize mixtures. In ice cream, xanthan gum acts as a stabilizer to prevent the ingredients from separating and ice crystals from forming, ultimately resulting in a smooth, creamy consistency and mouthfeel. Using xanthan gum can also help to extend the shelf life of your ice cream up to 3 months. (He-he, like it'll last that long!)