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Japanese Sweet Potato Fries Cooked in Air Fryer.

Japanese Purple Sweet Potato Fries (Air Fryer Recipe)

Matt
Crispy on the outside, soft and sweet on the inside—these easy Japanese sweet potato fries are air-fried to perfection in just minutes! A simple, healthy snack or side.
Prep Time 4 minutes
Cook Time 11 minutes
Course Side Dish
Cuisine American, Japanese
Servings 2 people

Ingredients
  

  • 1 Japanese sweet potato medium size
  • 1 tablespoon extra virgin olive oil
  • ¾ teaspoon sea salt
  • teaspoon fresh ground pepper

Instructions
 

Preheat the Air Fryer

  • Set to 380°F (190°C) and let it preheat for a few minutes.

Prepare the Sweet Potatoes

  • Peel (optional) – The skin is edible and adds nutrients.
  • Cut into ½-inch thick fries for even cooking.
  • In a large bowl or pan, toss the fries with olive oil, salt, and black pepper until evenly coated.

Air-Fry the Sweet Potato Fries

  • Cook in batches – Arrange fries in a single layer in the air fryer basket, ensuring they aren’t overcrowded.
  • Air fry at 380°F (190°C) for 11–12 minutes, shaking the basket or flipping the fries halfway through.
  • Check for doneness – Fries should be golden and crispy on the outside, soft on the inside. If needed, air fry for 1–2 more minutes.
  • Enjoy hot with your favorite dipping sauce or toppings!

Dipping Sauce: Honey Butter Drizzle

  • Warm 2 tablespoon butter in a microwave (5–10 sec) or room temp until soft.
  • Drizzle 1 teaspoon honey over the softened butter.
  • Serve alongside the fries for a sweet and buttery contrast!

Notes

Trim if needed – If your sweet potato sticks are too long, cut the ends to fit inside your air fryer basket. This ensures even cooking.
No need to soak – Unlike regular sweet potatoes, Japanese sweet potatoes crisp up naturally without soaking in water.
Batch cooking is key – Overcrowding the basket can cause the fries to steam instead of crisping up. Work in 2–3 batches for best results.
Adjust cooking time if needed – Air fryer models vary, so check at 11 minutes and add 1–2 extra minutes if needed.
Peeling is optional – The skin is edible and adds extra fiber and nutrients. If using organic Japanese sweet potatoes, consider leaving the skin on.
Want extra crispy fries? – Cook at 380°F (190°C) for 12–14 minutes and leave a little space between fries for maximum crunch.
Keyword air fryer, easy, fries, plant-based, savory, sidedish, vegetarian
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