Dehydrated potatoes are a convenient way to preserve fresh potatoes and keep them ready for future meals. They are lightweight, easy to store, and can be used in a variety of dishes, from soups and stews to casseroles and homemade potato snacks. Making them at home is also a practical way to use up extra potatoes before they start to spoil.
The good news is that you don’t need complicated equipment to get started. A food dehydrator is the easiest option, but you can also use an oven to dry potatoes. The most important steps are preparing the potatoes properly, blanching them before drying, and making sure all the moisture is removed before storage.
1. How to Dehydrate Potatoes in a Dehydrator
Ingredients
- Fresh potatoes
- Water
- Salt (optional)
Equipment
- Food dehydrator
- Large pot
- Sharp knife or vegetable peeler
- Cutting board
- Colander
- Large bowl
- Paper towels or clean kitchen towels
Instructions
Step 1: Wash and Peel the Potatoes
Wash the potatoes thoroughly under cool running water to remove dirt and debris. Peel them using a vegetable peeler and trim away any bruised or damaged areas. Removing the skin helps create a more uniform texture, although you can leave it on if you prefer.
Choose firm potatoes without signs of spoilage or green discoloration.
Step 2: Cut the Potatoes
Cut the potatoes into even slices or strips, depending on how you plan to use them later. For sliced potatoes, aim for approximately 1/8 inch thick. For shoestring-style strips, cut them about 1/4 inch thick.
Try to keep all the pieces similar in size and thickness so they dry evenly. A sharp knife or mandoline slicer can make this step easier.
Step 3: Blanch the Potatoes
Blanching is an important step when dehydrating potatoes. It helps stop enzyme activity that can cause changes in color, flavor, and texture during storage.
Bring a large pot of water to a rolling boil. Add the potato pieces and blanch them for about 5–6 minutes. If you are at an elevation of 5,000 feet or higher, blanch for approximately 7–8 minutes.
You can also steam-blanch the potatoes for about 6–8 minutes. Avoid overcooking them because they should be heated through but still hold their shape.
Step 4: Cool and Drain the Potatoes
Immediately transfer the blanched potatoes to a bowl of cold or ice water to stop the cooking process. Drain them thoroughly in a colander.
Spread the pieces on clean kitchen towels or paper towels and gently pat them dry. Removing excess surface water helps the potatoes dehydrate more efficiently.
Step 5: Arrange the Potatoes on Dehydrator Trays
Arrange the potato slices or strips in a single layer on the dehydrator trays. Leave a little space between each piece to allow warm air to circulate.
Avoid overlapping or stacking the potatoes, as this can lead to uneven drying. If you are preparing several batches with different thicknesses, place similar-sized pieces together so you can monitor their progress more easily.
Step 6: Set the Temperature and Dehydrate
Set your food dehydrator to 140°F (60°C). Let the potatoes dry for approximately 8–12 hours.
The exact drying time depends on the thickness of the pieces, their moisture content, and your dehydrator model. Thicker pieces may need additional time.
Check the potatoes toward the end of the drying period. If your dehydrator has multiple trays, rotate them when necessary to help achieve more even drying. Watch the potatoes closely as they approach the end because they can scorch when they become very dry.
Step 7: Check for Doneness
The potatoes are ready when they are completely dry, brittle, and crisp. Slices should snap easily rather than bend, and thicker pieces should feel hard throughout.
Remove a few pieces and allow them to cool before checking their texture. If they still feel soft or flexible, return them to the dehydrator for additional drying.
Once finished, turn off the dehydrator and let the potatoes cool completely before storing.
2. How to Dehydrate Potatoes in the Oven
If you don’t have a food dehydrator, you can use your oven as an alternative. Oven drying takes longer because conventional ovens may not provide the same consistent airflow as a dehydrator.
- Preheat your oven to 140°F (60°C), if it can maintain this low temperature.
- Wash, peel, and cut the potatoes into even slices or strips.
- Blanch the potatoes in boiling water for 5–6 minutes, then transfer them to cold water to stop cooking.
- Drain thoroughly and pat the pieces dry with clean kitchen towels.
- Arrange the potatoes in a single layer on baking sheets lined with parchment paper or on suitable drying racks.
- Place the trays in the oven with enough space around them for air circulation. Use the convection setting if available.
- Dry for approximately 8–24 hours, checking periodically and rotating the trays as needed.
- Remove the potatoes once they are brittle and completely dry. Allow them to cool before packing them into storage containers.
Keep an eye on the potatoes, especially toward the end of drying, to prevent scorching. If your oven cannot maintain a sufficiently low temperature, it may not be suitable for dehydrating potatoes.
3. How to Dehydrate Potatoes in an Air Fryer
An air fryer with a dedicated Dehydrate function can also be used to dry potatoes. However, not all air fryers can maintain the low, consistent temperature needed for proper dehydration.
- Wash, peel, and cut the potatoes into thin, even slices or strips.
- Blanch the potatoes in boiling water for 5–6 minutes, then cool and drain thoroughly.
- Pat the pieces dry to remove excess moisture.
- Arrange the potatoes in a single layer on the air fryer dehydrating trays without overlapping.
- Select the Dehydrate function and set the temperature to 140°F (60°C), if supported by your appliance.
- Dehydrate for approximately 8–12 hours, checking the potatoes periodically.
- Remove the potatoes when they are completely brittle and dry, then let them cool before storing.
Since air fryer models vary, always follow the manufacturer’s instructions and adjust the drying time as needed. If your appliance cannot maintain a suitable low temperature, use a food dehydrator or oven instead.
4. Frequently Asked Questions
Do you have to blanch potatoes before dehydrating?
Yes, blanching is recommended before dehydrating potatoes. It helps stop enzyme activity that can affect their color, flavor, and texture during storage. You can water-blanch potato pieces for about 5–6 minutes or steam-blanch them for 6–8 minutes.
What temperature is best for dehydrating potatoes?
The recommended temperature for dehydrating potatoes is 140°F (60°C). This temperature is commonly used for both food dehydrators and suitable ovens.
How long does it take to dehydrate potatoes?
Potatoes generally take about 8–12 hours in a food dehydrator. Oven drying may take up to twice as long, depending on the oven temperature, airflow, and thickness of the potato pieces.
How do you know when dehydrated potatoes are done?
Properly dehydrated potatoes should be brittle and crisp when completely cooled. They should snap easily rather than bend or feel soft. If the pieces still contain moisture, continue drying them before storage.
Can you dehydrate potatoes without peeling them?
Yes, you can leave the skin on if you prefer. Just make sure to scrub the potatoes thoroughly under running water and remove any damaged or green areas before cutting and blanching.
How long do dehydrated potatoes last?
When properly dried and stored in airtight, moisture-proof containers in a cool, dry, dark place, dehydrated potatoes can generally last 6–12 months. Check them regularly for signs of moisture or spoilage.
Conclusion
Dehydrating potatoes at home is a practical way to preserve fresh potatoes and keep a convenient ingredient ready for future meals. With proper preparation, blanching, and drying, you can make homemade dehydrated potatoes that are easy to store and rehydrate.
Once you get comfortable with the process, you can prepare potatoes in different shapes and sizes to suit your cooking needs. Keep a batch in your pantry and you’ll have a useful ingredient ready whenever you need it.
