Sweet potato chips offer a healthier alternative to store-bought potato chips, delivering more fiber, vitamins A and C, and complex carbohydrates without the deep-fried grease. When dehydrated rather than fried, they become crispy, naturally sweet snacks that satisfy crunchy cravings while providing genuine nutrition. A medium sweet potato contains only 112 calories but delivers 4 grams of fiber and 377% of your daily vitamin A needs.
The challenge with sweet potato chips is achieving crispiness without burning. Their high sugar content caramelizes quickly at temperatures above 135°F, creating dark, bitter edges while centers remain chewy. The solution is low-temperature drying and uniform slicing. This method produces light, crispy chips with concentrated sweetness that store for weeks without preservatives.
Selecting and Preparing Sweet Potatoes
Choose medium-sized sweet potatoes (6-8 inches long) with firm, smooth skin. Avoid giant sweet potatoes or those with soft spots, sprouts, or wrinkled skin. The fresher the sweet potato, the better the chip texture.
Varieties: Orange-fleshed varieties (Jewel, Garnet, Beauregard) produce classic sweet potato chips with vibrant color. White or purple varieties offer milder flavor and different nutritional profiles. All work well with this method.
Preparation: Scrub sweet potatoes thoroughly under running water. Peeling is optional—the skin adds fiber and nutrients, but some prefer the smoother texture of peeled chips. If peeling, use a vegetable peeler and remove all skin. If leaving skin on, scrub extra thoroughly to remove dirt.
For maximum sweetness, use sweet potatoes that have been stored for 2-4 weeks after harvest. The starches convert to sugars during storage, creating sweeter chips. Avoid very fresh sweet potatoes from the garden—they’ll taste starchy rather than sweet.
The Slicing Technique
Uniform thickness is critical. Uneven slices result in some chips burning while others remain soggy. Aim for 1/8 inch thickness (3mm)—thin enough to crisp but thick enough to maintain structure.
A mandoline slicer produces the most consistent results. Set it to 1/8 inch and use the guard—sweet potatoes are dense and can be slippery. If slicing by hand, use a sharp chef’s knife and cut slowly, maintaining even pressure.
Slice across the width to create round chips, or slice lengthwise for longer chips. Round chips are more aesthetically pleasing and cook evenly. The slices will shrink significantly during drying—expect 50% or more reduction in size.
After slicing, place sweet potato rounds in a bowl of cold water for 15-30 minutes. This removes excess surface starch that can cause sticking and browning. Drain and pat completely dry with paper towels before seasoning.
Seasoning Options
Sweet potatoes have natural sweetness that pairs well with both sweet and savory seasonings. Toss slices with oil first, then add seasonings to ensure even coating.
Basic Sea Salt: The simplest preparation highlights natural sweetness. Use 1 tablespoon olive oil and 1/2 teaspoon sea salt per large sweet potato.
Cinnamon Sugar: Mix 1 tablespoon melted coconut oil, 1 teaspoon cinnamon, and 1 teaspoon coconut sugar or brown sugar. This creates a sweet snack reminiscent of sweet potato pie.
Smoky Paprika: Combine 1 tablespoon olive oil, 1/2 teaspoon smoked paprika, 1/4 teaspoon garlic powder, and 1/4 teaspoon sea salt. The smokiness balances the sweetness beautifully.
Curry Spiced: Mix 1 tablespoon oil with 1/2 teaspoon curry powder, 1/4 teaspoon turmeric, and pinch of cayenne. Creates an exotic, aromatic chip.
Rosemary and Sea Salt: Finely chop fresh rosemary and toss with olive oil and sea salt. The herbal notes complement the sweet potato’s earthiness.
Don’t overseason. Sweet potatoes absorb flavors intensely during dehydration. Start with less seasoning than you think you need—you can always add more next batch. Over-salted sweet potato chips become inedible.
Drying Process
Arrange sweet potato slices in a single layer on dehydrator trays without overlapping. Overlapping creates steam pockets that prevent crisping. Sweet potatoes shrink significantly, so you can place them closer together than you would for fruits that hold their shape.
Set your dehydrator to 125°F (52°C). This temperature removes moisture efficiently without caramelizing sugars too quickly. Higher temperatures (135°F+) can cause the natural sugars to brown and become bitter.
Drying takes 8-12 hours depending on slice thickness, humidity, and sweet potato moisture content. Check after 8 hours. Properly dried chips feel rigid and snap when bent. They should not flex or feel leathery.
Rotate trays every 3-4 hours in vertical-flow dehydrators. Rear-mounted fan models dry more evenly and may not require rotation.
Sweet Potato Chips
Ingredients
- 2 large sweet potatoes
- 2 tablespoons olive oil or melted coconut oil
- 1 teaspoon sea salt
- 1/2 teaspoon cinnamon (optional)
Instructions
- Scrub sweet potatoes and peel if desired
- Slice to 1/8 inch thickness using mandoline or sharp knife
- Soak slices in cold water 30 minutes to remove starch
- Drain and pat completely dry with paper towels
- Toss with oil and seasonings until evenly coated
- Arrange in single layer on dehydrator trays
- Dry at 125°F for 8-12 hours until crisp
- Cool completely before storing
Storage Tips
Cool sweet potato chips completely before storing—warm chips placed in containers create condensation that leads to sogginess. Let them sit at room temperature for 30-60 minutes after removal from dehydrator.
Store in airtight glass jars or containers with tight-fitting lids. Plastic bags allow air exchange that gradually softens chips. Properly dried sweet potato chips stay crispy for 2-3 weeks at room temperature. For longer storage, refrigerate up to 2 months or freeze up to 6 months.
To Re-crisp: If chips lose crunch during storage, bake at 200°F for 10-15 minutes or return to dehydrator for 30-60 minutes at 125°F.
Nutritional Benefits: One cup of dehydrated sweet potato chips contains approximately 140 calories, 4 grams of fiber, and 280% daily value of vitamin A. Compare that to 160 calories and 10 grams of fat in the same amount of fried potato chips.
Conclusion
Sweet potato chips represent one of the most rewarding dehydrator projects—nutritious, delicious, and significantly cheaper than store-bought alternatives. The key is patience: low temperature (125°F) and adequate drying time (8-12 hours) produce crispy chips without the burnt edges that ruin the flavor.
Experiment with seasonings to find your favorite, but start with the basic sea salt version to appreciate the natural sweetness. Once you master sweet potato chips, try variations like cinnamon apple chips or beet chips for a colorful, healthy snack assortment.
