Soups & Stews
This sweet potato noodles soup recipe transforms humble ingredients into a velvety, umami-rich bowl that feels like a hug in every spoonful. The secret lies in roasting sweet potato "noodles" until caramelized and tender, creating a natural sweetness that balances the savory broth.
Unlike traditional noodle soups, these spiralized sweet potatoes hold their shape while absorbing the broth's rich flavors—no mushy textures here.
What sets this recipe apart is the vegan-friendly broth that builds depth through miso paste and turmeric, while fresh ginger and garlic sautéed in sesame oil add aromatic warmth. The vegetables—bok choy, carrots, and silken tofu—cook just until tender-crisp, ensuring every bite delivers both texture and flavor.
It’s the kind of soup that’s simple to make but feels like a restaurant-quality meal.
By the time you’re done, you’ll have a golden-hued soup with silky sweet potato strands floating in a velvety broth, garnished with crisp green onions and a drizzle of chili oil.
The contrast of sweet, savory, and slightly spicy flavors makes this more than just soup—it’s a comforting, nutrient-packed dish that’s perfect for chilly evenings or quick weeknight dinners.
The best part? This recipe scales effortlessly—double the batch for leftovers or adjust the vegetables based on what’s seasonal. Whether you’re a seasoned home cook or just starting in the kitchen, this foolproof method ensures velvety sweet potatoes and perfectly balanced flavors every time.
Let’s get started on making your bowl of warmth.
Ingredients for sweet potato noodles soup
Roasted sweet potatoes and aromatic broth create this velvety, umami-rich soup with restaurant-quality depth.
| Ingredient | Amount | Notes |
|---|---|---|
| Large Sweet Potatoes 🍠 | 2 whole | Organic preferred, uniform size |
| Vegetable Broth 💧 | 4 cups | Low-sodium preferred |
| White Miso Paste 🍶 | 2 tbsp | Organic, non-GMO preferred |
| Fresh Ginger 🌿 | 1 tbsp | Finely grated, peeled |
| Garlic Cloves 🧄 | 4 cloves | Minced, fresh preferred |
| Sesame Oil 🫒 | 1 tbsp | Toasted, for aroma |
| Turmeric Powder 🌶️ | 1 tsp | Freshly ground preferred |
| Bok Choy 🥬 | 1 bunch | Baby variety preferred |
| Carrots 🥕 | 4 medium | Baby carrots work too |
| Silken Tofu 🍱 | 8 oz | Extra-firm preferred |
| Green Onions 🧅 | 4 whole | Thinly sliced for garnish |
| Chili Oil 🌶️ | 1 tbsp | Homemade or store-bought |
| Sea Salt 🧂 | 1 tsp | Diamond Crystal preferred |
| Black Pepper 🌶️ | ½ tsp | Freshly ground preferred |
The sweet potatoes are the foundation—organic, uniform size ensures even roasting. Look for vibrant orange flesh with smooth skin at Whole Foods or your local farmers market. Baby carrots and bok choy add texture contrast, so choose fresh, crisp varieties with no wilting. The miso paste should be white miso for mild sweetness, not red. For the tofu, extra-firm silken tofu holds its shape best when sliced thinly. If you can't find sesame oil, toasted sesame seeds work in a pinch—just crush them into the broth.
No miso paste? White soy sauce with an extra pinch of sugar approximates the flavor. Substitute fresh turmeric root for the powder if available—it's more potent. For extra protein, add edamame or mushrooms. The chili oil can be homemade (just chili flakes + neutral oil) or store-bought. If your carrots are large, peel and cut into matchsticks for even cooking. The broth should be low-sodium to balance the umami from miso and turmeric—adjust seasoning at the end if needed.
Roasted sweet potatoes keep 3 days in the fridge, covered tightly. The broth can be made ahead and reheated—flavors meld beautifully overnight. For meal prep, store components separately: noodles, broth, and veggies. Reheat gently on the stove with a splash of water to restore silkiness. The chili oil and green onions are best added fresh—drizzle just before serving for maximum brightness. Freeze the soup for up to 3 months by portioning into airtight containers.
Why You'll Love This Recipe
- No Spiralizer Needed: I’ll admit, I resisted buying one of those gadgets—until I realized you can just julienne sweet potatoes with a knife. Takes two minutes, no fancy tools, and the strands hold up perfectly in broth.
- Umami Magic: That white miso paste? Chef’s kiss. It’s the secret weapon here—deep, savory, and just a spoonful makes the broth taste like it simmered for hours. (Spoiler: it didn’t.)
- Lunchbox Hero: Between us, this soup is my go-to for meal prep. The noodles stay tender for days, and I just reheat portions straight from the fridge—no soggy texture, just warm, cozy goodness.
- Budget-Friendly Flex: Sweet potatoes and miso stretch this recipe into a full week’s worth of dinners. Honestly, I’ve made it three times already, and the pantry staples cost less than takeout. (Yes, even on a Tuesday night.)
Step-by-step instructions for sweet potato noodles soup
Transform humble sweet potatoes into silky noodles with this method—roasting unlocks their natural sweetness while preserving texture.
Roast Sweet Potatoes for Noodle Texture
Preheat oven to 425°F. Pierce the 2 whole large sweet potatoes with a fork in several places, then place them directly on the oven rack. Roast for 45-50 minutes until tender when pierced with a knife and skin is slightly charred. The fork tines create steam vents that prevent explosions while concentrating sweetness.
Let the potatoes cool for 10 minutes before handling. Using a sharp peeler, carefully remove the skin, then slice each potato lengthwise into ¼-inch thick planks. Stack 3-4 planks and slice crosswise into ¼-inch wide noodles. The roasting transforms starch into natural sweetness while creating that signature noodle texture without any processing.
Build the Umami-Rich Broth Base
In a large pot, combine the 4 cups vegetable broth, 2 tbsp white miso paste, 1 tbsp finely grated fresh ginger, and 4 minced garlic cloves. Bring to a gentle simmer over medium heat for 5 minutes until fragrant. The miso will dissolve completely, creating a velvety foundation that carries the sweet potato flavor.
Add the 4 medium carrots, cut into ½-inch rounds, and simmer for another 8 minutes until carrots soften but retain shape. Strain through a fine-mesh sieve to remove solids, pressing gently with a spoon to extract maximum flavor. This clear broth will be the perfect vehicle for your sweet potato noodles.
Cook Silken Tofu and Prepare Vegetables
Cut the 8 oz silken tofu into ½-inch cubes and set aside. In the same pot, heat 1 tbsp sesame oil over medium heat until shimmering. Add the tofu cubes and cook for 3-4 minutes until lightly golden on all sides. Remove with a slotted spoon and set aside.
Separately, trim the 1 bunch bok choy, separating leaves from stems. Cut stems into ½-inch pieces and leaves into ¼-inch strips. Thinly slice the 4 whole green onions for garnish. The bok choy will add fresh contrast to the rich sweet potato base.
Assemble and Finish the Soup
Return the strained broth to the pot and bring to a gentle simmer. Add the sweet potato noodles and simmer for 3-4 minutes until just heated through and slightly tender. The noodles should maintain their shape while absorbing the broth's flavor. Add the cooked tofu and bok choy stems, simmering for another 2 minutes.
Season with 1 tsp sea salt and ½ tsp black pepper, then stir in the 1 tbsp chili oil. Taste and adjust seasoning—you want a balance of sweet, umami, and subtle heat. The chili oil should coat the noodles without overpowering their natural sweetness.
Serve with Fresh Garnishes
Ladle the soup into bowls, arranging the noodles attractively. Top each serving with bok choy leaves and sliced green onions. The fresh greens provide a vibrant contrast to the rich, velvety broth. Serve immediately while the noodles maintain their perfect texture—this soup doesn't reheat well.
Each spoonful should deliver a harmonious blend of sweet potato sweetness, umami depth from the miso, and fresh vegetable brightness. The silken tofu adds protein while the chili oil introduces just enough heat to balance the dish's natural sweetness.
Pro Tips For Making Sweet Potato Noodles Soup
- PEEL AND SPIRAL COLD: Sweet potatoes are stubborn when hot—peel and spiral them after chilling in the fridge for 30 minutes. The starch settles, slices stay intact longer, and you won’t end up with a mushy pile of orange confetti in your broth.
- TOAST THE GARLIC: Sauté minced garlic in oil until it’s golden—not just fragrant, but actually browned. This adds a nutty depth that cuts through the sweetness of the miso and sweet potatoes. (Yes, even if you’re impatient like me—wait for the color.)
- STIR MISO LAST: Add white miso paste after removing the pot from heat, then stir gently. Direct heat can turn it bitter, and aggressive mixing releases all its umami at once, overwhelming the broth. Let it melt into the soup like a whisper, not a shout.
- SALT THE BROTH FIRST: Season the vegetable broth with salt before adding the sweet potatoes—this ensures the noodles absorb flavor evenly. I used to add it later and always wondered why the dish tasted flat in the middle. (Pro tip: 1 tsp per quart, even if the broth says “low-sodium.”)
Wine and beer pairings for this recipe
Light White Wine
This soup’s delicate sweetness and umami depth pair beautifully with a crisp, aromatic white wine. I reach for a Sauvignon Blanc from New Zealand—its bright citrus notes and herbal undertones cut through the sweet potatoes while complementing the miso’s savory richness.
A Pinot Grigio from Italy also works wonderfully, especially if you prefer a lighter, more neutral profile that lets the soup’s flavors shine. 🍷
Earthy Red Wine
For those who prefer red, a light-bodied Pinot Noir from Oregon or Willamette Valley offers surprising harmony. Its red fruit and earthy notes mirror the roasted sweet potatoes, while its acidity balances the dish’s natural sweetness. Avoid heavy reds like Cabernet—they’ll overwhelm the soup’s delicate texture and flavor profile.
Asian-Inspired Beer
If wine isn’t your thing, try a Japanese lager like Sapporo or Asahi. Their clean, crisp profiles highlight the soup’s umami and sweetness without competing. For a hoppier option, a Belgian witbier adds a refreshing citrusy contrast that pairs perfectly with the chili oil’s subtle heat. 🍺
Non-Alcoholic Options
Don’t miss out on the pairing fun! A sparkling apple cider (chilled) mirrors the soup’s sweetness while adding effervescence. For something bolder, try hibiscus iced tea—its tartness enhances the miso’s umami and the chili oil’s kick. Both options feel festive and refreshing alongside this comforting dish.
Pro Pairing Tip
Serve your wine or beer slightly cooler than room temperature—around 50-55°F for whites and 45-50°F for beers. This enhances their acidity and keeps them crisp, allowing the soup’s flavors to truly stand out. I always pour mine just before serving to maintain the perfect temperature. ✨
Nutrition facts
Frequently asked questions
Can I use regular potatoes instead of sweet potatoes?
Regular potatoes won't work as well because they lack the natural sweetness and vibrant color that sweet potatoes provide. The roasting process caramelizes the sugars in sweet potatoes, creating that signature velvety texture and flavor. If you must substitute, try purple sweet potatoes for a deeper hue and slightly earthier taste.
How do I prevent the sweet potato noodles from turning mushy?
Roast the sweet potatoes until tender but not overcooked—pierce with a fork to check doneness. Then, cook the noodles in the broth for only 3-4 minutes after adding them. Overcooking breaks down the fibers, so remove them from heat as soon as they're heated through. The key is keeping them al dente!
Can I make this soup gluten-free or nut-free?
This recipe is naturally gluten-free and nut-free. Just ensure your miso paste (some contain wheat) and vegetable broth (check for additives) are certified gluten-free. The sesame oil is optional—if avoiding sesame, use neutral oil like avocado oil instead. All other ingredients are inherently safe for these dietary needs.
What if I don't have a spiralizer for the sweet potatoes?
No spiralizer? No problem! Use a sharp peeler or mandoline to create thin planks, then stack and slice crosswise into noodles. Alternatively, shred the roasted sweet potatoes with a box grater—it won't be perfect, but the texture will still work well. The key is keeping the pieces uniform for even cooking.
How can I make this soup spicier?
Add more chili oil (start with 2 tbsp instead of 1 tbsp) or stir in ½ tsp red pepper flakes while simmering. For heat with depth, try a pinch of cayenne or a dash of sriracha at the end. Remember, you can always adjust—start mild and build from there!