What is slurry Published on Jul 17, 2020 Updated on Jul 21, 2020 in « Back to Glossary IndexA slurry is a mixture of equal parts cornstarch to water. The water is whisked with the cornstarch to make a thickening agent. A slurry acts like roux and can be used in thickening soups, stews, sauces, and gravy.Related Articles:Ultimate Vegan Green Bean CasseroleIt is that time of the year again! Thanksgiving. We are happy to be able to bring you this version of the classic vegan green bean casserole!Vegan Mushroom GravyYou will love how easy, quick, and healthy this vegan gravy recipe is to make. The recipe is literally just 6 ingredients! Super flavorful and simple!