*Arrow root is an alternative to flour or cornstarch that you find in the spices section of your grocery store. When using arrow root, you only need about one-third the amount you would use with flour or cornstarch. It has a neutral flavor and unlike flour, you don't have to cook it to remove the taster. It can be used to thicken sauces, salad dressings, and pie fillings. If you don't have arrow root, you can replace it with cornstarch for this recipe.