Three roasted sweet potatoes on a bamboo tray
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5 from 4 votes

Roasted Sweet Potato

How to bake Japanese roasted sweet potato just like the ones you can buy from street food trucks in Japan. Step by step instructions on how to make "Yaki Imo"
Prep Time5 mins
Cook Time1 hr
Course: Side Dish, Snack
Cuisine: Japanese
Keyword: #baked sweet potato, #roasted sweet potato, #yakiimo
Servings: 3
Calories: 112kcal
Author: Shihoko | Chopstick Chronicles



  • 3 purple sweet potatoes *1


  • Wash the sweet potatoes
  • Wrap the sweet potatoes with aluminium foil tightly.
  • Arrange the aluminium foil wrapped sweet potatoes on a frying pan or a skillet over low heat.
  • Place a lid over the frying pan or the skillet and roast the sweet potato slowly for about 1 hour. *2
  • Turning the sweet potatoes about 90 degrees every 15 minutes.
  • Insert a skewer, if the sweet potatoes are soft, turn the heat off and serve.


*1 see the information in the post how to choose good sweet purple potato, 6-8cm (2.5-3inch) in diameter is ideal size. 
*2 depends of the size of the sweet potato, you may need to adjust the cooking time less or more. 


Calories: 112kcal | Carbohydrates: 26g | Protein: 2g | Fat: 1g | Saturated Fat: 1g | Sodium: 72mg | Potassium: 438mg | Fiber: 4g | Sugar: 5g | Vitamin A: 18443IU | Vitamin C: 3mg | Calcium: 39mg | Iron: 1mg