No Dehydrator? No Problem. How to Dehydrate Food in the Oven

No Dehydrator? No Problem. How to Dehydrate Food in the Oven


Dehydrated foods are ideal for backpackers and hikers because they are lightweight, can withstand heat, and they are easy to store.  Have you ever wanted to dehydrate your own trail food but don’t have the money to invest in an electric dehydrator?  I’m going to teach you how to dehydrate food in the oven. This is a fairly simple process, but is rather time consuming.  Keep in mind also that the lowest temperature most ovens go is 140°F and the higher the temperature, the more nutrient content is lost.  Most food dehydrators go as low as 85 or 95 degrees F, which keep the beneficial living enzymes in tact.  If you’re interested in using a food dehydrator to preserve your foods keep them in a raw state, I suggest the Excalibur EXC10EL Food Dehydrator.


Set your oven on its lowest setting.  This will probably be between 140 degrees F and 200 degrees F.  The lower your oven setting, the longer your food will need to be in but more nutrient content will remain in tact.  You can choose a little bit higher setting if you are short on time, but keep in mind more of the nutrient value will be lost.


Prep your food.  If you are dehydrating fruit, you will need to peel and slice or chop them.  To prevent browning, you might want to dip some fruits in a lemon juice mixture (1 cup lemon juice : 4 cups water)  Vegetables will need to be chopped and either blanched or steamed.  Blanching is done by immersing food in water for several minutes.  Cook any meals you wish to dehydrate.  While chopping ingredients, you want to make sure everything is a uniform size so that it will dry out at the same rate.


Spread food out on flat cookie sheet.  You will want a single layer of food and a flat cookie sheet to ensure air flow around all sides of the food.


Place cookie sheet in oven.  You will probably want to prop the oven door open a few inches to improve air flow.  You also might want to place a food-grade thermometer inside the oven door to periodically check oven temps.


Leave food in oven for around 6-8 hours.  Depending on what you are dehydrating, times will vary but 6-8 hours seems to be the average.  Fruits will be pliable but almost brittle when done and most vegetables will be brittle when done.   If the food is stuck to the tray when done put it in the freezer for a few minutes and it should pop right off.


Store food.  The more airtight you can store the food, the better.  If you don’t have a vacuum sealer, opt for freezer bags and try to remove as much air as possible before sealing the bag.

dehydrated apple


  • Fruit – berries, apples, cherries, pineapple, pears, watermelon
  • Vegetables – kale, sweet potatoes, potatoes, carrots, green beans, broccoli
  • Beef Jerky


  • Chili
  • Soups and Stews – Lentil, black bean
  • Curries
  • Veggie burrito bowls
  • Ground or minced meats

So, have you tried dehydrating food in your oven?  I’d love to hear how it worked out for you.  If you have any questions or tips please feel free to comment below!

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4 thoughts on “No Dehydrator? No Problem. How to Dehydrate Food in the Oven”

  • Wow, really great information. You learn something new everyday! I’ve never tried dehydrating something in the oven, but it seems pretty simple, I guess the only downfall is time. I also would’ve never known that the lower the heat, the more nutrients are retained. Great tip too on if it starts to break apart to put it in the freezer. Thanks for sharing!

    • Hi Jeremy,
      Yes, too much heat kills healthy enzymes, destroys vitamins, and can change the pH level of food. Its debated what temperature that is exactly but generally, you want to use the lowest heat setting possible.

      Dehydrating does take time but its really just waiting time and you’re not actively doing much. I usually just pick a day when I know I will be home all day anyways, then I do other chores and such while I wait for the food to dehydrate.

  • What is the purpose of dehydrating your food other than for preserving it longer? Is than any other reason to do it? I’m just wondering because I recently started hearing about this. Anyways, I’ve been wanting to do this so that we can have real food as opposed to processed foods to give to our kid for snacks. Thanks for the informative read!

    • Hi Daniel,

      People dehydrate for different reasons but preserving food longer is definitely one of them. When you remove moisture content from food it makes the food less prone to bacteria and molds. Dehydrated fruit can last up to 5 years if its properly prepared and stored! Dehydrated real food snacks are definitely superior to processed food snacks. You can make your own fruit leathers instead of giving the kids fruit roll ups.

      For backpacking purposes, the appeal of dehydrated foods are the weight, the cost savings compared to store bought backpacking meals, convenience, and you get to control the ingredients and portions.

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