I bought a snack mix that had dried rhubarb in it. It tastes really good, kind of chewy but was a great addition to the energy mix. The rhubarb I ate had been sweetened but it adds a tangy taste if just dried without sweeteners. Directions To Dehydrate Rhubarb 1. Slice off the ends of your rhubarb and dice into even size pieces. I keep mine about 1/4″ thick. You want all your pieces to be fairly close in size so that they dry evenly. I slice all of mine with a mandolin slicer because it keeps them even. This is also a good size to throw a few pieces in your morning oatmeal. 2. Layer your sliced rhubarb on your dehydrator sheets in a single layer. 3. Turn your dehydrator onto the recommended settings. I dry mine at 135 degrees for 8-12 hours rotating my trays at least three times throughout the process. I make sure my dehydrator is packed at this time so keep in mind if your only drying a try or two your drying time will be significantly less. 4. Rhubarb is dry when it is crisp and will break easily with no “leather” feeling when breaking. Because my pieces are so thin it looks a lot like dried celery. Dehydrate Rhubarb Instead Of Wasting Your Surplus - Farmer's Wife Rambles I am going to try this but am asking if any Monkeys had mishaps dehydrating rhubarb, tips or advice. I find quite often these things that sound really easy on the internet often leave out information.