A dehydrator is one of the most underused appliances in American kitchens. People buy one for jerky, run it once, and then it sits in a cabinet for two years. The reality is that a dehydrator is best understood as a slow oven that runs all night on the same energy budget as a refrigerator, producing food that lasts months without freezer space. The economics work out clearly for a household that buys fruit and herbs in bulk during peak season, hunts or buys meat in larger cuts, or wants pantry-stable snacks without commercial additives. This guide covers the foods worth dehydrating, the foods to skip, the temperature and time settings by category, and the storage approach that keeps dried goods viable for a year or longer.
Best uses, ranked by value
Fruit leather: takes overripe or imperfect fruit and turns it into a kid-favorite shelf-stable snack. Puree fruit (with optional sweetener and lemon juice), spread on a silicone sheet or parchment in a thin even layer (about 1/8 inch), dry at 135 F for 6 to 8 hours. Peel when slightly tacky but not sticky.
Beef and turkey jerky: a steady supply of high-protein snack at one-third the cost per ounce of store-bought. Slice lean cuts (eye of round for beef, turkey breast) thinly, marinate 12 to 24 hours, pre-cook to safe internal temperature, then dehydrate at 140 F for 4 to 8 hours.
Herbs (basil, parsley, oregano, thyme, rosemary, mint, sage): each fresh bunch produces a half cup or more of dried herb that retains flavor far better than store-bought dried. Dry at 95 to 110 F for 2 to 4 hours, or at room temperature for 5 to 7 days if you do not have time pressure.
Apple slices, banana chips, mango: lunch box staples that cost a quarter of dried fruit at the store. Apples dry at 135 F for 6 to 10 hours. Bananas at 135 F for 6 to 8 hours. Mango at 135 F for 8 to 12 hours.
Strawberries, raspberries, blueberries: extend short summer seasons. Whole berries at 135 F for 10 to 14 hours. Halved strawberries dry faster.
Mushrooms: any wild or cultivated variety. Concentrate flavor dramatically and rehydrate well for soups and risotto. Dry at 110 to 125 F for 4 to 8 hours.
Tomatoes: sun-dried tomato style, but in 12 to 18 hours rather than a week in the sun. Halve, salt lightly, dry at 135 F.
Lower-value but useful
Vegetable chips (zucchini, sweet potato, beet, kale): work well but compete with the air fryer for the snack chip use case. Better dried for hiking and camping than for everyday snacking.
Citrus peel: dried orange, lemon, and grapefruit peel for tea, cooking, and cocktail garnish. Dry at 95 to 110 F for 8 to 12 hours.
Dried beans for soup mixes: most beans should be canned or stored dry from the start. The exception is when you have a glut of fresh shell beans that you want to dry quickly for storage.
Yogurt drops: blend yogurt with fruit, spread on silicone sheets, dehydrate at 135 F for 8 to 10 hours. A novelty more than a staple.
Skip these
High-fat foods (avocados, fatty meats, full-fat dairy products beyond the yogurt drop novelty): the fat oxidizes during the long drying time and goes rancid in storage.
Lettuce and high-water salad greens: not enough mass left after drying to justify the effort.
Cucumbers and melons (except watermelon, which dries into a chewy candy-like product as a curiosity): texture goes to leather, flavor disappears.
Anything you would not eat dried: dehydrating does not improve a food’s quality, only its shelf stability.
Temperature settings by category
Most dehydrators have a temperature dial from 90 to 165 F. The settings that actually matter:
90 to 100 F: live food culture (yogurt incubation, sourdough proofing), raw food enthusiast vegetable drying (preserves more enzymes), curing herbs to retain volatile oils.
115 to 125 F: fruits when texture and color are priority, mushrooms, vegetables that should stay close to raw.
135 to 140 F: fruits when speed is the priority, fruit leather, most vegetables, tomatoes.
140 to 150 F: jerky (after pre-cooking to 160 F internal).
160 to 165 F: pre-cooking step for jerky if the dehydrator reaches that high.
Running too cold extends drying time and increases the window where bacteria can grow on borderline foods. Running too hot destroys flavor compounds and can case-harden food (the outside dries while the inside stays moist, leading to spoilage).
Drying times, practical reality
Times vary by humidity, dehydrator efficiency, slice thickness, and how full the trays are. Approximate guidelines for a typical 5 to 9 tray dehydrator at 135 F:
- Apple slices (1/4 inch): 6 to 10 hours
- Banana chips (1/4 inch): 6 to 8 hours
- Strawberries (halved): 8 to 12 hours
- Berries (whole): 10 to 14 hours
- Tomato halves: 10 to 14 hours
- Mushroom slices: 4 to 8 hours
- Pepper rings: 4 to 8 hours
- Fruit leather: 6 to 8 hours
- Herb leaves: 2 to 4 hours at 110 F
The doneness test: bend a piece. Fruits should be pliable but not sticky. Vegetables should be crisp and snap when bent. Jerky should bend without breaking and crack but not snap. If in doubt, dry longer; under-dried food spoils. Over-dried food is fine and rehydrates with a few minutes in warm water.
Storage that works
Cool the dried food fully to room temperature before storing, otherwise condensation forms inside the container.
Glass jars: best for short to medium term (3 to 6 months). Wide mouth pint and quart mason jars work well. Add a desiccant packet (silica gel) if the climate is humid.
Vacuum-sealed bags: best for medium to long term (6 to 12 months). Removes oxygen, which is the main driver of color and flavor loss. Vacuum sealers cost $80 to $200 for a basic model.
Mylar bags with oxygen absorbers: best for long-term storage (1 to 5 years for low-moisture foods). The standard for emergency preparedness pantries.
Store in a cool, dark, dry place. Pantry shelves at 60 to 70 F work for short-term. A cool basement or cellar at 50 to 60 F doubles the practical shelf life.
Conditioning step for fruits: after the dehydrator finishes, leave the dried fruit in a loosely closed glass jar for a week. Shake daily. This evens out residual moisture between pieces. If condensation appears, return to the dehydrator for a few more hours.
For more on related kitchen equipment, see our methodology page on how we evaluate food preservation gear. A mid-range dehydrator (Cosori, Excalibur 3000 series, COSORI Premium) costs $130 to $200, runs 6 to 12 watt-hours per hour, and pays back the investment within 1 to 2 seasons of regular use.
Frequently asked questions
What is the best temperature for dehydrating jerky?+
USDA guidance recommends heating meat to 160 F internal first (160 F for beef and poultry, 145 F for whole-muscle pork) to kill pathogens, then dehydrating at 130 to 140 F until dry. Some dehydrators run hot enough to do both steps; many home models do not exceed 165 F, in which case pre-cooking the marinated strips in a 275 F oven for 10 minutes before dehydrating is the safe protocol. Never dehydrate raw meat at low temperatures only; this is a documented foodborne illness risk.
Why is fruit leather a better use of dehydrator time than dried whole fruit?+
Fruit leather concentrates a tray of fresh fruit into a single small sheet that takes minimal space, requires no rehydration to eat, and uses every bit of the fruit including soft or imperfect specimens that would not dry well as slices. A 9-tray dehydrator can produce 4 to 6 sheets of fruit leather from the same fruit volume that would yield only 12 to 16 ounces of dried fruit slices. Leather is also more shelf-stable because the puree drying surface area is more controlled.
How long does dehydrated food actually last?+
Properly dried foods stored in airtight containers in a cool, dark, dry place last 6 to 12 months for fruits and vegetables, 3 to 6 months for jerky, and 1 to 3 years for herbs. Vacuum-sealed bags with oxygen absorbers double those numbers. The limiting factor is usually moisture (foods that absorb humidity from the air go bad) and oxidation (which fades color and flavor). Texture remains stable longer than flavor; old dried fruit is safe to eat but tastes flat.
Can I use my oven instead of buying a dehydrator?+
For occasional small batches, yes. Set the oven to its lowest setting (usually 170 to 200 F), prop the door open slightly with a wooden spoon to let moisture escape, and turn food periodically. The downsides: most ovens cannot run below 170 F, which is hotter than ideal for fruits and herbs (better dried at 95 to 115 F); ovens use significantly more electricity than dehydrators; and tying up the oven for 8 to 12 hours is inconvenient. A dedicated dehydrator pays for itself in 1 to 2 years if you dry more than a few batches.
What foods should I not bother dehydrating?+
High-fat foods (avocados, fatty cuts of meat, peanut butter, dairy) go rancid quickly even when dry. Foods that are great fresh and bad dried (lettuce, cucumbers, melons except watermelon for novelty). Foods with low yield (a head of broccoli dehydrates down to a tablespoon). Foods that take 24 plus hours of dehydrator time (whole tomatoes, large squash chunks) when other methods (freezing, canning) work better. Stick to foods that concentrate well and store well.
Alex Patel
Alex Patel writes for The Tested Hub.