Nature’s Flavors Rhubarb Flavor Concentrate is a very rich and full-bodied flavor. It's very strong, so a little goes along way. This flavor is excellent for baking at about 1 to 5% usage, depending on how hot and how long you bake it for. It's additionally good in ice cream, sorbets, shakes, sauces, beverages, puddings, yogurts, and more.