Dehydrated Kale Chips

What are dehydrated kale chips?

Dehydrated kale chips are kale leaves dried at low temperature (115–125°F) until completely brittle. They preserve more heat-sensitive nutrients than oven-baked chips and stay crispy for up to 4 weeks in an airtight container.

The difference between dehydrated and oven-baked kale chips comes down to temperature and time. Oven methods run at 275–350°F, which cooks the chips quickly but degrades vitamin C and some B vitamins. Dehydrator methods run at 115–125°F over 4–6 hours, which evaporates moisture slowly without significant nutrient loss.

For gardeners with a fall kale harvest — one of the most productive cool-season crops in the US — dehydrating converts fresh kale into a shelf-stable snack that keeps far beyond what fresh storage allows.

Best kale varieties for chips

Curly kale produces crispy, airy chips with a slightly stronger flavor. Lacinato (Tuscan or dinosaur kale) has flatter leaves that dehydrate more evenly. Both work well.

Red Russian kale has the thinnest leaves and dehydrates fastest — usually 3–4 hours. Curly kale has more surface area but uneven thickness means checking for spots that are still pliable before stopping the dehydrator.

For growing your own kale supply, see kale companion plants for productive garden pairings.

Equipment you need

A food dehydrator with adjustable temperature settings is the primary tool. Inexpensive stackable round models work, but the airflow direction means you rotate trays every 2 hours for even drying. Horizontal-flow box dehydrators (Excalibur is the US standard) dehydrate more evenly without tray rotation.

Minimum equipment:

• Food dehydrator with temperature range to 115–125°F
• Large mixing bowl
• Salad spinner (essential — residual water is the main cause of chewy chips)
• Parchment paper or mesh dehydrator sheets to catch small bits

No dehydrator: Use your oven at its lowest setting, typically 200–300°F. Results are faster but less evenly crispy. See the oven method section below.

Preparing the kale

Wash kale leaves, remove the center rib, and spin completely dry before adding oil. Any moisture on the leaf surface adds 1–2 hours to dehydrating time and increases the chance of chewy results.

Step-by-step preparation:

1. Wash kale under cold running water. Swirl in a bowl of water to dislodge any soil.
2. Use a salad spinner to remove as much surface water as possible.
3. Pat remaining moisture with a clean towel.
4. Strip leaves from the center rib by folding the leaf in half and pulling the rib away. Discard ribs or save for a different use — ribs are too thick for even dehydrating.
5. Tear or cut leaves into 2–3-inch pieces. They shrink by 60–70% during dehydrating, so start larger than you think necessary.
6. Place in a large mixing bowl.

Seasoning ratios that work

Use 1 tablespoon of oil per 4 cups of kale. More oil makes chips greasy and prevents full crisping. Less oil means seasonings don’t adhere.

Massage oil into every surface of every leaf. This step is worth taking seriously — unmassaged spots will not season or dehydrate evenly.

Basic seasoning (per 4 cups of kale):

• 1 tablespoon olive oil or avocado oil
• 0.5 teaspoon fine sea salt

Nutritional yeast savory blend:

• 1 tablespoon olive oil
• 1 tablespoon nutritional yeast
• 1 teaspoon garlic powder
• 0.5 teaspoon smoked paprika
• 0.5 teaspoon salt

Spicy ranch:

• 1 tablespoon olive oil
• 1 teaspoon dried dill
• 0.5 teaspoon onion powder
• 0.5 teaspoon garlic powder
• 0.25 teaspoon cayenne
• 0.5 teaspoon salt

Nutritional yeast deserves attention as a kale chip ingredient. It adds umami depth, a slight cheesy flavor, and additional B vitamins. It’s sold at most US natural food stores (Whole Foods, Sprouts, Trader Joe’s) and works better on chips than on any other application.

Dehydrator settings and timing

Set the dehydrator to 115–125°F. Arrange kale in a single layer — overlapping pieces trap moisture and create chewy spots.

Load dehydrator trays without overlap. If using a stackable round model, rotate trays every 2 hours (top to bottom, outside to inside on round models) to account for uneven airflow.

Dehydrating times by variety:

• Red Russian kale: 3–4 hours
• Lacinato kale: 4–5 hours
• Curly kale: 5–6 hours

Check at the minimum time. Chips are done when they snap cleanly with no give. A chip that bends without snapping needs another 30–60 minutes. Err toward longer — slightly over-dehydrated chips are still good; under-dehydrated chips go stale within days.

Allow chips to cool on trays for 15 minutes before tasting. They firm up slightly as they cool.

Oven method (no dehydrator)

Preheat oven to 300°F. Spread seasoned kale in a single layer on parchment-lined baking sheets. Bake 20–25 minutes, checking every 5 minutes after the 15-minute mark.

Oven chips are more prone to burning at the edges while the center remains pliable. Watch carefully during the last 5–8 minutes. Signs of readiness: edges are visibly crisp and papery; the entire chip is dry-looking rather than glossy from oil.

At 300°F, more of the vitamin C and folate in kale is destroyed compared to low-temperature dehydrating. For purely practical snacking, oven chips work fine. For gardeners preserving a nutritional harvest, dehydrator is the better method.

Storage for long shelf life

Store completely cooled chips in an airtight container — a mason jar or zip-lock bag — with a silica gel packet. They last 3–4 weeks at room temperature. Any residual warmth or moisture when sealing causes condensation and softens chips within days.

Confirm chips are completely crispy and room temperature before sealing. If you are unsure, leave them uncovered for an additional 30 minutes after removing from the dehydrator.

For longer storage (up to 3 months), seal in a vacuum bag using a food vacuum sealer. This removes ambient air that carries moisture.

Do not refrigerate kale chips — refrigerator humidity softens them within hours.

Using garden kale for chips

Kale grown at home typically has more intense flavor than store-bought. Garden plants also allow you to harvest leaves at ideal size — not too young (low flavor) and not too mature and tough.

Harvest outer leaves when they are 8–12 inches long. The flavor is sweetest after the first light frost in fall — cold temperatures convert some of the kale’s starches to sugar.

In Zone 6b, kale planted in late July provides a fall harvest from September through November. In warmer zones (8–10), fall and winter are the primary growing seasons. Cool-season kale in the heat of Zone 8 summer becomes bitter and tough — not ideal for chips.

For more on growing productive kale plants, see how to start a vegetable garden.

Outbound resource: USDA FoodData Central (fdc.nal.usda.gov) provides nutrient data for raw and cooked kale, including vitamin C retention comparisons across preparation methods.