How to Dehydrate Sweet Potato Chips in Canada

Sweet potato chips are the dehydrating project that earns the most goodwill. Bagged sweet potato chips at any Canadian Bulk Barn or Loblaws cost $5 to $8 for 100 g. A 1 kg bag of Ontario sweet potatoes from a fall farmers’ market is roughly $3 to $5 and yields two jars of chips that are noticeably better than anything you can buy.

This guide covers the blanching step that separates good chips from grey leathery disappointments, the dehydrator and oven methods, and five seasoning paths.

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The Canadian sweet potato

Sweet potatoes are increasingly Canadian-grown. Norfolk County, Ontario — the same sand-soil tobacco-and-asparagus belt north of Lake Erie — has been growing commercial sweet potatoes since the 1990s. The local season runs August through October; storage crops are available at grocers through January.

For dehydrating:

• Orange-fleshed sweet potatoes (Beauregard, Covington, Garnet) — the standard. Sweet, dries to a bright orange chip.
• Purple sweet potatoes (Stokes Purple, Okinawan) — drier, denser, more savoury. Chips end up deep purple — visually striking, slightly nutty in flavour.
• White-fleshed sweet potatoes — less sweet, more starchy. Closer to a regular potato chip texture.
• “Yams” at Canadian grocers — actually sweet potatoes (US labelling); treat the same way.

Avoid soft, sprouting, or wrinkled sweet potatoes — they’ve been in storage too long and the texture suffers.

The blanching step (essential, not optional)

Sweet potatoes contain enzymes that oxidize during slow drying, producing grey or brown-tinted chips. A brief blanch deactivates these enzymes and also pre-softens the cell structure so the chips crisp evenly.

Skip this step and the chips are still safe to eat — but ugly.

The technique:

1. Slice the sweet potatoes.
2. Bring a large pot of water to a rolling boil.
3. Have a bowl of ice water ready beside the stove.
4. Drop the slices into the boiling water for 2 to 3 minutes.
5. Drain and plunge into the ice water for 2 minutes to stop the cooking.
6. Drain again and pat dry with a tea towel.

The slices should be slightly translucent at the edges but still firm. Then proceed with the oil-and-seasoning toss.

What you need

For a 1 kg batch yielding about 2 × 500 mL jars:

• About 1 kg sweet potatoes
• Mandoline — for consistent 3 to 5 mm slices
• Large pot for blanching
• Large bowl of ice water
• 1 to 2 tbsp olive oil
• Seasoning — pick one
• Dehydrator OR low oven
• Airtight glass jars for storage

Five seasoning paths

Salt and cinnamon (classic Canadian)

• 1 tsp fine sea salt
• 1 tsp ground cinnamon

Tastes like fall. The default for orange sweet potatoes.

Smoked paprika

• 1 tbsp smoked paprika
• 1 tsp fine sea salt
• ½ tsp garlic powder

Smoky-savoury. Good with beer.

Curry

• 1 tbsp curry powder
• ½ tsp turmeric
• Pinch of salt

Warming. Pair with yogurt-mint dip.

Maple-pepper

• 1 tbsp pure maple syrup mixed into the oil
• 1 tsp coarse black pepper
• Pinch of salt

Very Canadian. Sweet-savoury balance.

Garlic-rosemary

• 1 tsp garlic powder
• 1 tsp dried rosemary, crushed
• 1 tsp fine sea salt

Mediterranean. Excellent with hummus.

The method (dehydrator)

1. Wash, peel, slice — 3 to 5 mm thick on a mandoline.
2. Blanch 2 to 3 minutes in boiling water; ice-bath; drain; pat dry.
3. Toss with oil and seasoning in a large bowl.
4. Single layer on dehydrator trays. No overlap.
5. Dry at 55 to 60 °C (130 to 140 °F) for 8 to 12 hours.
6. Test for done: pick a slice, cool 30 seconds, bend. Done chips snap.
7. Cool fully before packing.
8. Condition for 4 to 5 days before sealing long-term storage.

The method (oven)

1. Same prep — slice, blanch, ice-bath, dry.
2. Toss with oil and seasoning.
3. Line baking sheets with parchment; single layer.
4. Set oven to 100 °C (210 °F), prop the door open 5 cm.
5. Dry 3 to 5 hours, flipping at the midpoint.
6. Same snap test.

Storage

• Airtight glass jars in a cool, dark place at 12 to 18 °C
• Best quality 3 to 6 months — longer than zucchini and kale chips because of lower oil content
• For 6 to 12 months: dehydrate plain (no oil), store with an oxygen absorber, toss with oil and seasoning at serving time
• Inspect monthly for moisture or off odours

How to use sweet potato chips

• Snack jar — the obvious
• Trail mix — combine with dried apples, nuts, and dried cranberries
• Salad topping — adds crunch and colour to grain bowls
• Soup topping — float on top of squash, lentil, or chicken soup
• Cheese board — pair with sharp cheddar or goat cheese
• Pulverized as seasoning — sweet-potato powder is a soup-and-curry flavour booster

Common problems

• Chips are grey or dark brown. Skipped the blanching step. Re-do with blanching next batch.
• Chips are leathery. Sliced too thick, didn’t dry long enough, or skipped the blanching pre-soften. Use a mandoline; blanch; dry to snap-crisp.
• Chips burned on the edges. Oven temperature too high. Drop to 90 °C and accept a longer drying time.
• Chips lost crispness after a month. Normal for oiled chips. Switch to plain-store-and-season-later for longer shelf life.
• Some chips crisp, others still soft. Slice thickness varied. Use a mandoline.

When to make them

September through November in Canada. Ontario sweet potatoes peak at farmers’ markets in October; grocery store prices on sweet potatoes drop in October-November as the storage crop comes in. A 5 kg bag from a Toronto/GTA farmers’ market in October runs $10 to $15 — enough for 10 jars of chips.

Next steps

• How to dehydrate apples in Canada — the fall fruit cluster mate
• How to dehydrate zucchini chips in Canada — another savoury vegetable chip
• How to dehydrate kale chips in Canada — the leafy version
• Root cellaring in Canada — for whole sweet potato storage (an alternative to drying)
• Best dehydrator in Canada — equipment guide
• Dehydrating at home in Canada — temperatures, times, and safety