The shape and seediness of whole raspberries makes pureed raspberry fruit leather the best option for drying the juicy summertime favorite. Fruit leathers from raspberry puree may be dried in an oven or a dehydrator. If you prefer to preserve the red fruits in whole form, you can use either an oven or a dehydrator.
Preheat the oven to 140 degrees Fahrenheit, if using the oven method. Prepare the oven-drying trays by lining a cookie sheet with plastic wrap and smoothing the wrap's surface to minimize unevenness in the final product. If you're using a dehydrator, set the manufacturer's liner sheets into the dehydrator tray or trays.
Remove any stems and debris from individual raspberries, if needed.
Puree 2 cups of whole raspberries in a food processor or blender, then press the pureed raspberries through a sieve to remove the seeds.
Squeeze a lemon to extract fresh lemon juice.
Combine the puree with 1/4 cup honey and 1 tablespoon lemon juice.
Spread the raspberry puree over the plastic-lined cookie tray or lined dehydrator tray, using a spatula or spoon. Aim for a layer that's 1/8 to 1/4 inch thick.
Set the tray in the preheated oven and leave the door propped open 2 to 6 inches. Alternatively, put the dehydrator tray in the dehydrator and set the appliance's thermostat to 135 to 140 F, unless the manufacturer suggests otherwise.
Remove the raspberry leather after about 6 hours, or when it is leathery and easily bent.
Peel the leather off the plastic wrap or dehydrator liner and set it on a clean piece of plastic wrap. Roll the plastic-covered raspberry leather up tightly, and store.
Dried Whole Fruit
Preheat the oven to 140 F, or set your dehydrator to 140 F or the manufacturer's recommended setting.
Remove any stems and debris from individual berries, if necessary.
Place the whole raspberries on a cookie sheet if you're drying them in the oven. Place them on the dehydrator tray if you're using a dehydrator.
Check the berries after 4 hours. Remove them when they are hard and no juice escapes when pressed. The raspberries will also have a rattling sound when they have dried completely.
Store the cooled, dried whole raspberries in a clean, airtight container.
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- Washington State University Skagit County Extension: Raspberries
- University of Alaska Fairbanks Cooperative Extension Service: American Red Raspberry
- Sunset Home Canning: Preserving, Freezing, Drying, Picking; Barbara E. Goldman, et al.
- If your dehydrator doesn't come with liner sheets, cut plastic wrap to fit the square or circular trays, and tape the wrap in place at the outer edges of the trays.
- If you have a large bounty of raspberries to process into fruit leather, spread the raspberry puree over more than one cookie sheet or tray. Use 1/4 cup honey and 1 tablespoon lemon juice for every 2 cups of raspberry puree.
- When drying multiple trays of raspberry leather or whole raspberries in the oven, rotate the berries among oven racks for more even drying. The dehydrator does not require rotation.
- Raspberries easily turn to mush if soaked or blasted with water. Rinse the berries only if they are excessively gritty and do so extremely lightly.
Ellen Douglas has written on food, gardening, education and the arts since 1992. Douglas has worked as a staff reporter for the Lakeville Journal newspaper group. Previously, she served as a communication specialist in the nonprofit field. She received her Bachelor of Arts from the University of Connecticut.