3 Ingredient Miso Butter Sweet Potatoes (Vegetarian)

3 Ingredient Miso Butter Sweet Potatoes (Vegetarian)

I know you’re reading this because the idea of using three ingredients to make a delicious dish is appealing to you.  I don’t blame you, it’s appealing to me too.

Unfortunately, many dishes marketed this way feel forced, and even incomplete.  Not so here.  I can promise you that I will always put the integrity of the recipe ahead of marketing!

Miso is the real workhorse here.  It has such complex, umami flavor that it adds incredible depth to the dish all on its own.  Paired with sweet and creamy Japanese sweet potatoes it just shines.

I buy Japanese sweet potatoes weekly, they are so versatile and have yet to fail me.  Olivia Munn credits her glowing complexion to eating multiple Japanese sweet potatoes a day.  I can’t quite speak to all that but what I do know is I’m obsessed with their taste and capabilities.

miso sweet potatoes

ingredients for miso butter potatoes:

White Miso – I use white miso in this recipe, which is made of soybeans fermented with a good percentage of rice.  It’s sweet, and the most mild of all the misos.  If you’re new to miso, it’s a great place to start.  You can find it in the refrigerated section at most grocery stores.

Japanese Sweet Potatoes – My favorite variety of sweet potatoes are white Japanese sweet potatoes.  They are just delicious.  They are creamier than orange sweet potatoes, and have a faint vanilla taste to me.  They are the ones with purple skins in the grocery store, and well worth trying if you haven’t before.

“what else can i use?”

  • If you can’t find Japanese sweet potatoes, use the orange ones more widely available.
  • Red miso can be substituted for the white miso.  It will have a more robust flavor, so use sparingly and to taste.

I know you will love these three ingredient wonder potatoes.  Be sure to check out this recipe and this recipe if you want more fun and healthy sweet potato dish ideas.  If you make them, I’d love to hear from you!  Leave me a note or message me on Instagram.  Enjoy!


Three Ingredient Miso Butter Sweet Potatoes

It only takes three ingredients to get the most delicious sweet potatoes, smothered with butter and salty miso and melt in your mouth texture.
5 from 1 vote
Prep Time 5 minutes
Cook Time 1 hour 5 minutes
Course Dinner, Side Dish
Servings 4 people


  • Large rimmed baking sheet


  • 2 large Japanese white sweet potatoes
  • 1/4 cup unsalted butter
  • 2 tbsp white miso
  • Kosher salt


  • Preheat the oven to 425°F and line a rimmed baking sheet with parchment paper or aluminum foil. Use a fork to poke holes into the sweet potatoes, and set them on the baking sheet.
  • Roast for 45 to 50 minutes, flipping over half way, until the potatoes are oozing a bit and you can easily pierce them with a fork.
  • When cooked, remove from the oven and let cool until you can handle them. Set the oven to broil on Hi and make your miso butter.
  • In a small saucepan, melt the butter over medium low heat until melted. Add in the miso and whisk to incorporate. The miso will still be a bit clumpy and that’s okay.
  • Slice the sweet potatoes in half lengthwise and keep on the baking sheet. Brush each half with the miso butter, getting all those miso bits onto the potatoes. Sprinkle lightly with Kosher salt.
  • Broil for 3-5 minutes until the tops have turned to a light golden brown.
  • Remove and let cool for 5 minutes.
    Serve and enjoy!
Keyword baked potatoes, miso, potatoes, sweet potatoes
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1 thought on “3 Ingredient Miso Butter Sweet Potatoes (Vegetarian)”

  • 5 stars
    Made these for dinner tonight. Still wondering how something so easy could be so delicious! Glad I have leftovers because they will be tomorrow’s lunch!

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