Sweet Potato Miso Soup is a creamy, flavorful soup made with sweet potatoes, white miso, ginger, and a few simple pantry ingredients. It's an easy, nourishing recipe that's perfect for lunch, dinner, or meal prep.
Updated April 2026: I've refreshed this post with a full Expert Tips section, expanded FAQs, variations, and make-ahead instructions based on your questions and feedback. Originally posted May 23, 2018.
There's something about a bowl of soup that just fixes things. Whether it's a gray Tuesday that won't quit or one of those evenings where you can't decide what to cook, this sweet potato miso soup has become my answer. I first made it years ago when I was experimenting with miso paste for the first time. I didn't know much about it, honestly, but the combination of sweet potatoes and that salty, savory miso flavor stopped me in my tracks after the first taste. It was warm, velvety, and just a little unexpected in the best way.
I've made this soup dozens of times since then, tweaking the aromatics and testing it warm versus chilled to make sure every version is worth your time. My family loves it, and I love that it comes together in about 30 minutes with ingredients that are genuinely easy to find at any grocery store, no specialty shopping required.
If you're looking for a soup that's light enough to feel good about but satisfying enough to actually fill you up, this one is it. Let's get started!
Why You'll Love This Sweet Potato Miso Soup
- Ready in 30 minutes - One pot, one blender, and you're done. This is a legitimate weeknight recipe.
- Naturally vegan and dairy-free - No cream, no butter. The sweet potatoes blend into a velvety texture all on their own.
- Warm or chilled - Equally delicious both ways, which makes it perfect for meal prep and lunchbox thermos situations.
- Simple, pantry-friendly ingredients - Sweet potatoes, miso, ginger, broth, and a few aromatics. That's it.
Ingredients You'll Need
- Sweet potatoes are the backbone of this soup. They bring natural sweetness and blend into a silky, creamy texture without any added dairy. I use orange-fleshed sweet potatoes here, not Japanese sweet potatoes (which have a drier, starchier texture that doesn't blend as smoothly).
- White miso paste is key. White miso is milder and slightly sweeter than red or yellow miso, which makes it the right choice for this soup. It adds savory depth without overpowering the sweet potato. Look for it in the refrigerated section near tofu or Asian specialty ingredients. And importantly: always stir miso in after you've removed the soup from heat. High heat destroys the probiotic cultures that make miso so beneficial, and it can also turn the flavor bitter.
- Fresh ginger brings a gentle warmth to the broth that balances the sweetness of the potatoes. I grate mine fresh, pre-minced jarred ginger works but the flavor won't be as bright.
- Vegetable broth keeps this soup fully plant-based. Low-sodium broth gives you more control over the salt level, since miso is already salty. If you prefer chicken broth, that works too and adds a slightly richer flavor.
- Yellow onion and garlic are your aromatic base. They build the savory foundation that makes every sip taste layered and full.
👉🏾 See the recipe card below for exact quantities and full instructions.
How to Make Sweet Potato Miso Soup
Step 1: Sauté Your Aromatics
Heat olive oil in a large saucepan over medium heat, then add the chopped onion, garlic, and grated ginger. You want to cook them until they're soft and fragrant, about 3 to 4 minutes. Don't rush this step. Softened aromatics dissolve seamlessly into the blended soup; undercooked ones can leave a sharp, raw edge in the flavor.
Step 2: Add Sweet Potatoes and Broth
Add the peeled, cubed sweet potatoes and pour in the broth. Bring the pot to a boil, then reduce to a steady simmer. The potatoes are ready when they're completely fork-tender. Piercing one should feel like going through soft butter. This usually takes 15 to 20 minutes depending on how small you cut the cubes. Smaller cubes = faster cook time.
Step 3: Blend Until Smooth
Remove the pot from heat. Carefully transfer the soup to a blender and blend until completely smooth, or use an immersion blender directly in the pot. If using a regular blender, work in batches and never fill it more than halfway with hot liquid, steam pressure can blow the lid off. Hold a folded dish towel over the top for safety.
Step 4: Stir In the Miso
This is the most important step to get right. Once the soup is blended, stir in the white miso paste off heat until it's fully dissolved. Adding miso to actively boiling liquid kills the beneficial probiotic cultures and can make the flavor sharper than you want. Stir it in warm (not screaming hot) soup for the best result.
Step 5: Season and Serve
Taste the soup and adjust seasoning with salt and pepper. Then serve it warm topped with sliced green onions, or let it cool completely and refrigerate it to serve chilled. Both are genuinely great.
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LaKita's Expert Tips
- Cut your sweet potatoes to a similar size so they cook evenly. Aim for roughly 1-inch cubes. Small enough to cook through in 15 minutes, but not so small that you're spending extra time at the cutting board.
- Always add miso off heat. This is the single most important rule with miso. High heat destroys its probiotic benefits and can make the flavor sharp or bitter. Stir it into warm (not boiling) soup for the best flavor and nutrition.
- Use an immersion blender for easier cleanup. You can blend directly in the pot, which means fewer dishes and less risk of hot soup splashing. Blend in long, slow passes from the bottom up.
- If the soup is too thick, thin it with a splash of broth. After blending, the consistency can vary depending on your sweet potatoes. Add warm broth, a tablespoon at a time, until it reaches the texture you want.
- Taste before adding salt. Miso is already quite salty, especially if you used regular (not low-sodium) broth. Always taste the finished soup before reaching for the salt shaker.
- For a richer flavor, try roasting the sweet potatoes first. Spread cubed sweet potatoes on a sheet pan, toss with a little oil and a drizzle of maple syrup, and roast at 400°F for 25 to 30 minutes before adding to the pot. It adds a caramelized depth that takes the soup to another level.
Variations & Substitutions
- Add coconut milk for an extra creamy, slightly tropical version. Stir in ½ cup full-fat coconut milk after blending in place of some of the broth. It pairs beautifully with the ginger.
- Use red or yellow miso if that's what you have on hand. Red miso is bolder and saltier, so start with 1 tablespoon and taste before adding more.
- Add a pinch of smoked paprika or cayenne to the pot with the broth if you want a little heat and smokiness woven into the base flavor.
- Swap the vegetable broth for chicken broth if you're not keeping this vegan. The richer flavor pairs well with the sweetness of the potatoes.
- Top with protein to make it a full meal. Grilled shrimp, baked tofu, or crispy chickpeas are all excellent options.
- Stir in a handful of spinach or kale after blending and before serving for added greens. The residual heat wilts them perfectly.
Make-Ahead & Storage
Make-Ahead
This soup is an excellent make-ahead recipe. You can make the full batch up to 3 days in advance and store it in an airtight container in the refrigerator. The flavor actually improves after a day, as the ginger and miso have more time to meld together. Just hold off on garnishing until you're ready to serve.
Storage & Reheating
Refrigerator: Store in an airtight container for up to 4 days. Freezer: This soup freezes well for up to 2 months. Portion it into freezer-safe containers or zip-lock bags. Thaw overnight in the fridge before reheating. Reheating: Warm on the stovetop over medium-low heat, stirring occasionally, until heated through. You can also reheat in the microwave in 90-second intervals, stirring between each. If the soup thickens in the fridge (which it often does), stir in a splash of broth or water to loosen it back up.
What to Serve with Sweet Potato Miso Soup
- As a light lunch served in a thermos or mason jar. It's great chilled or at room temperature for on-the-go eating.
- As a starter or side dish paired with a warm, crusty bread or biscuits. Try it alongside Cheddar Herb Biscuits for a cozy cold-weather meal.
- As a weeknight dinner alongside Roasted Chicken Thighs for a balanced, satisfying plate. The rich savory chicken pairs nicely with the lighter sweetness of the soup.
- Topped with sesame seeds, a drizzle of sesame oil, or crispy chickpeas for extra texture and a more complete bowl.
- Served warm with a simple side salad. The clean, bright flavors of a dressed green salad balance the richness of the blended soup well.
Frequently Asked Questions
White miso paste (also called shiro miso) is the best choice here. It has a mild, slightly sweet flavor that complements the sweet potatoes without overpowering them. Red miso is stronger and saltier. You can use it, but start with half the amount and taste as you go.
Miso is a fermented paste, and high heat destroys the beneficial probiotic cultures that make it so nutritious. It can also make the flavor harsh and bitter when boiled directly. Stirring it into warm (not boiling) soup after blending preserves both the probiotic benefits and the best flavor.
As written with vegetable broth, this soup is fully vegan and dairy-free. For gluten-free, check your miso paste label. Most white miso is made from rice and soybeans and is naturally gluten-free, but some brands include barley. Look for one labeled certified gluten-free to be sure.
Yes! An immersion blender works wonderfully and is actually easier since you blend directly in the pot. If you don't have either, you can mash the sweet potatoes with a potato masher for a chunkier (non-blended) texture. It won't be as silky but will still taste great.
This is common, sweet potatoes are starchy and the soup can thicken as it blends and cools. Simply stir in warm broth or water, a tablespoon at a time, until you reach the consistency you like. It will also thicken in the fridge overnight, so you may need to thin it again when reheating.
Absolutely. This soup freezes beautifully for up to 2 months. Let it cool completely, then portion into freezer-safe containers or bags. Thaw overnight in the refrigerator before reheating on the stovetop or in the microwave. It may need a splash of broth to thin it back out after thawing.
Yes, for this soup you want to peel them. Since you're blending the soup completely smooth, you want clean, even blending, and sweet potato skins can leave a slightly fibrous texture and affect the color. Peel, cube, and you're good to go.
Yes, and it's really good chilled! After making and blending the soup, let it cool to room temperature, then refrigerate for at least 2 hours. Serve cold in a bowl or cup. It's a great warm-weather option or easy chilled lunch. The flavors are slightly different when chilled but just as satisfying.
Most well-stocked grocery stores carry miso paste in the refrigerated section near tofu, tempeh, or other Asian specialty ingredients. Whole Foods, Trader Joe's, and most Asian grocery stores reliably stock it. If you can't find it locally, it's also widely available online.
Use the classic orange-fleshed sweet potato (Beauregard or Garnet variety), these are the most common in U.S. grocery stores and blend into a naturally sweet, creamy texture. Avoid Japanese sweet potatoes (which have pale yellow flesh and a drier, starchier texture) for this recipe, as they won't blend as smoothly or have the same rich sweetness.
📖 Recipe
Sweet Potato Miso Soup Recipe
Equipment
- 1 sharp knife
- 1 cutting board
- 1 large saucepan
- 1 Blender
Ingredients
- 1 tablespoon olive oil
- 1 small yellow onion, chopped (½ cup)
- 2 cloves garlic, minced
- 1 tablespoon fresh ginger, grated
- 2 medium sweet potatoes, peeled and cubed (2-2 ½ cups cubed)
- 4 cups vegetable broth or chicken broth
- 2 tablespoons white miso paste
- salt and ground black pepper to taste
- 2 green onions, thinly sliced (for garnish)
Instructions
- Heat 1 tablespoon olive oil in a large saucepan over medium heat. Add 1 small chopped yellow onion, 2 cloves minced garlic, and 1 tablespoon grated ginger. Sauté for 3-4 minutes.
- Add 2 cubed sweet potatoes and 4 cups broth. Bring to a boil, then reduce to simmer and cook for 15-20 minutes until tender.
- Carefully transfer soup to a blender and blend until smooth (or use an immersion blender).
- Stir in 2 tablespoons miso paste until fully combined. Season with salt and pepper to taste.
- Serve warm or chilled, garnished with green onions. Enjoy!
Notes
- Serve warm in a bowl topped with green onions or sesame seeds.
- Enjoy chilled in a small jar or thermos for on-the-go lunches.
- Top with grilled shrimp or tofu for extra protein.
- Pair with a simple side salad or crusty bread.
Did You Make This Recipe?
If you give this sweet potato miso soup a try, I'd love to know what you think! Leave a comment below, share a photo on Instagram and tag @SimplyLaKita, or save it on Pinterest for later. And if you have any questions about ingredients or technique, drop them in the comments. I'm always happy to help!
Lynette McComas says
sweet potato? how much missing from the recipe
LaKita says
Hi Lynette! It is 3 sweet potatoes and it is in the ingredient list.
Akaleistar says
That soup looks absolutely delicious!
LaKita says
Thank you 🙂