How to Dehydrate Carrots in the Oven

Before you start

Carrots are one of the easiest vegetables to dry, and they are useful in soups, stews, and rice dishes. An oven can work if you do not have a dehydrator, but it is less efficient. Most home ovens run hotter at their lowest setting than the ideal drying temperature of about 140°F recommended by the National Center for Home Food Preservation (NCHFP) for vegetables, and they trap humid air.

A few cautions:

• Use an oven thermometer to see what temperature you are really getting.
• If the oven cannot go below roughly 170°F, prop the door open slightly to let moisture escape and to lower the temperature. If you have a convection fan, turn it on.
• Do not leave the oven unattended for long periods, and keep children and pets away from an open door.
• Too much heat early on can harden the outside of the pieces while the inside stays moist, which makes the carrots spoil in storage. Keep the temperature moderate and the pieces thin.

If you dry food often, a dehydrator is more reliable. See dehydrated or freeze dried for how the options compare.

What you need

• Fresh, firm carrots, free of soft spots
• A vegetable brush and peeler (optional)
• A sharp knife or mandoline
• A pot for blanching, or a steamer, plus a bowl of ice water
• Baking sheets with wire racks, or parchment-lined sheets
• An oven thermometer
• Airtight jars for storage

Step-by-step

1. Wash and trim. Scrub carrots under running water and trim the ends. Peeling is optional, but peels can taste slightly bitter after drying.
2. Slice evenly. Cut into rounds or matchsticks about 1/4 inch thick. Uneven pieces dry at different speeds, and slices much thicker than this take noticeably longer.
3. Blanch. Blanching stops enzyme action that dulls color and flavor and helps carrots rehydrate. NCHFP guidance for carrots is to steam for about 3 minutes or boil for about 3 to 4 minutes, depending on piece size. Many cooks use 2 to 3 minutes for thin slices. Cool in ice water for the same time, then drain.
4. Dry the surface. Pat the carrots dry with towels so extra water does not slow the oven.
5. Arrange. Lay pieces in a single layer without touching, on racks set over baking sheets for better airflow, or on parchment.
6. Dry. Place in the oven at the lowest safe setting, ideally near 140°F, with the door propped if needed. Stir or flip every hour or so, and rotate the sheets.
7. Check often as time passes. Pieces on the edges and the smallest pieces finish first. Remove those as they finish.
8. Cool. Let the carrots cool fully before testing or packing.

How long does it take?

Expect many hours. Roughly 6 to 10 hours is a common range for oven drying, and it can run longer with thick slices, a crowded oven, or humid weather. There is no single number that applies to every oven, which is why the doneness test below matters more than the clock. As a general point, drying any food in the oven takes longer than in a dehydrator, and the answer depends on the food, thickness, and temperature.

How to tell carrots are done

Dried carrots should be hard, shriveled, and brittle or tough, and should snap rather than bend. Let a few pieces cool, then break one in half. There should be no moist or soft spots. If in doubt, dry them longer.

Conditioning and storage

NCHFP recommends conditioning dried vegetables before long-term storage:

1. Pack the cooled carrots loosely in a jar, filling it about two-thirds.
2. Shake the jar daily for about a week.
3. If you see condensation on the glass, the food needs more drying. Return it to the oven. If you see mold, throw it out.

Then pack into clean airtight jars or bags and store in a cool, dark, dry place. Dried vegetables are generally kept for about a year at room temperature, longer if cooler, but quality declines over time. Some sources recommend freezing home-dried food for a few days to kill insect eggs before storage.

How to use dried carrots

• Add straight to soups, stews, and pot dishes, where they rehydrate as they simmer.
• Soak in hot water for 15 to 30 minutes before adding to sauces, casseroles, or rice.
• Grind into carrot powder for seasoning or baby food. Make sure they are fully brittle first.
• Include in homemade just-add-water meals, like those in our dehydrated vegan recipes.

Troubleshooting

• Chewy, not brittle: keep drying. Thick pieces or a humid oven are common reasons.
• Browning or scorched edges: the oven is too hot. Lower the temperature, prop the door further, or cut thinner.
• Pale color: blanching may have been skipped or too short.
• Moisture in the jar: dry again and re-condition.

Common questions

How do the Amish store carrots? Traditional approaches include cool, dark root cellars, often with carrots packed in damp sand or sawdust. Drying and canning are other options, as is pickling; see pickled cauliflower, carrots and celery. Check regional extension guidance for any method you try.

How long does it take to dehydrate food in an oven in general? It varies widely with the food, how thick it is, and the oven temperature. Plan on many hours and use doneness tests.

Can you freeze dry carrots without blanching? Some people do, but blanching helps with color and flavor, and many sources recommend it for vegetables. If you own a machine, follow its manual. See our freeze drying guide for more.