This comforting vegan Japanese winter squash and leek soup is perfect for chilly days. The creamy texture and rich flavors make it a delightful dish that warms you from the inside out. Combining the sweetness of kabocha squash with the subtle onion-like taste of leeks, this soup is both nutritious and satisfying.
If you're not familiar with kabocha, it's a type of Japanese winter squash known for its sweet flavor and creamy texture. You might also need to look for coconut milk in the international or health food aisle. Leeks can sometimes be overlooked in the produce section, so keep an eye out for their long, green stalks.

Ingredients for Vegan Japanese Winter Squash and Leek Soup
Japanese winter squash (kabocha): A sweet and creamy squash that adds depth to the soup.
Leeks: Provide a mild, onion-like flavor that complements the squash.
Vegetable broth: Forms the base of the soup, adding savory notes.
Coconut milk: Adds creaminess and a subtle tropical flavor.
Olive oil: Used for sautéing the leeks, adding a rich, fruity flavor.
Salt: Enhances the flavors of the other ingredients.
Black pepper: Adds a hint of spice and warmth.
Ground ginger: Provides a zesty, slightly spicy note.
Ground nutmeg: Adds a warm, nutty flavor that complements the squash.
Technique Tip for This Recipe
When preparing the leeks, make sure to clean them thoroughly as they can harbor dirt and grit between their layers. Slice the leeks lengthwise first, then rinse them under cold running water, fanning out the layers to ensure all debris is removed. This will prevent any unwanted texture in your soup.
Suggested Side Dishes
Alternative Ingredients
japanese winter squash (kabocha) - Substitute with butternut squash: Butternut squash has a similar sweetness and creamy texture when cooked, making it a good alternative.
leeks - Substitute with onions: Onions provide a similar aromatic base, though they are slightly stronger in flavor.
vegetable broth - Substitute with mushroom broth: Mushroom broth adds a rich umami flavor that complements the other ingredients well.
coconut milk - Substitute with almond milk: Almond milk provides a creamy texture and mild flavor, though it is less rich than coconut milk.
olive oil - Substitute with avocado oil: Avocado oil has a similar healthy fat profile and a neutral flavor that works well in soups.
salt - Substitute with soy sauce: Soy sauce adds a depth of flavor and umami, though it will also add a bit of color to the soup.
black pepper - Substitute with white pepper: White pepper has a similar spiciness but is less visually noticeable in the soup.
ground ginger - Substitute with fresh ginger: Fresh ginger provides a more vibrant and aromatic flavor, though you may need to use a bit more.
ground nutmeg - Substitute with ground cinnamon: Ground cinnamon offers a warm, sweet spice that complements the other flavors in the soup.
Other Alternative Recipes Similar to This Soup
How To Store / Freeze This Soup
Allow the soup to cool to room temperature before storing. This helps prevent condensation, which can lead to a watery texture and spoilage.
Transfer the soup to airtight containers. Glass containers with tight-fitting lids or BPA-free plastic containers work best to maintain freshness and prevent odors from seeping in.
For short-term storage, place the containers in the refrigerator. The soup will stay fresh for up to 4-5 days.
If you plan to store the soup for a longer period, consider freezing it. Use freezer-safe containers or heavy-duty freezer bags. Leave some space at the top of the container or bag to allow the soup to expand as it freezes.
Label the containers with the date of preparation. This helps you keep track of how long the soup has been stored and ensures you consume it while it's still at its best quality.
When ready to reheat, thaw the soup in the refrigerator overnight if frozen. This gradual thawing helps maintain the texture and flavor.
Reheat the soup on the stovetop over medium heat, stirring occasionally to ensure even heating. You can also reheat it in the microwave, using a microwave-safe bowl and stirring halfway through the heating process.
If the soup appears too thick after reheating, add a splash of vegetable broth or coconut milk to reach your desired consistency. Adjust the seasoning if necessary.
Enjoy your reheated vegan Japanese winter squash and leek soup with a garnish of fresh herbs or a drizzle of olive oil for an extra touch of flavor.
How To Reheat Leftovers
Gently reheat the soup on the stovetop: Pour the leftover Vegan Japanese Winter Squash and Leek Soup into a pot. Warm it over medium-low heat, stirring occasionally to prevent sticking and ensure even heating. This method preserves the coconut milk's creamy texture and the delicate flavors of the leeks and kabocha.
Microwave for convenience: Transfer a portion of the soup to a microwave-safe bowl. Cover it with a microwave-safe lid or a damp paper towel to avoid splatters. Heat on high for 2-3 minutes, stirring halfway through. Adjust the time based on your microwave's power and the amount of soup.
Use a double boiler for gentle reheating: Place the soup in a heatproof bowl. Set the bowl over a pot of simmering water, ensuring the bottom of the bowl doesn't touch the water. Stir occasionally until the soup is heated through. This method helps maintain the soup's smooth consistency without scorching.
Reheat in the oven for a larger batch: Preheat your oven to 350°F (175°C). Pour the soup into an oven-safe dish and cover it with foil. Heat for about 20-30 minutes, stirring halfway through, until the soup is thoroughly warmed. This is ideal if you're reheating a large quantity for a family meal.
Add a splash of vegetable broth or coconut milk if the soup has thickened: Sometimes, soup can thicken as it sits. To restore its original consistency, stir in a bit of vegetable broth or coconut milk while reheating. This will also enhance the flavors and keep the soup velvety smooth.
Best Tools for This Recipe
Large pot: Used to cook the leeks and squash together with the broth and spices.
Immersion blender: Used to puree the soup until smooth.
Chef's knife: Essential for peeling and cubing the squash and slicing the leeks.
Cutting board: Provides a stable surface for chopping the vegetables.
Measuring spoons: Used to measure out the salt, pepper, ginger, and nutmeg.
Measuring cup: Used to measure the coconut milk and vegetable broth.
Wooden spoon: Useful for stirring the soup as it cooks.
Ladle: Used to serve the hot soup into bowls.
How to Save Time on This Recipe
Pre-cut vegetables: Buy pre-cut kabocha squash and leeks to save chopping time.
Use a high-speed blender: Instead of an immersion blender, use a high-speed blender for quicker and smoother results.
Batch cooking: Double the recipe and freeze half for a quick meal later.
Prep ingredients ahead: Clean and slice leeks and cube squash the night before.
Instant pot: Use an Instant Pot to reduce cooking time by half.

Vegan Japanese Winter Squash and Leek Soup
Ingredients
Main Ingredients
- 1 medium Japanese winter squash (Kabocha) peeled and cubed
- 2 large leeks cleaned and sliced
- 4 cups vegetable broth
- 1 cup coconut milk
- 2 tablespoons olive oil
- 1 teaspoon salt
- ½ teaspoon black pepper
- ½ teaspoon ground ginger
- ¼ teaspoon ground nutmeg
Instructions
- Heat olive oil in a large pot over medium heat.
- Add leeks and cook until soft, about 5 minutes.
- Add cubed squash, vegetable broth, salt, pepper, ginger, and nutmeg.
- Bring to a boil, then reduce heat and simmer for 20 minutes, until squash is tender.
- Use an immersion blender to puree the soup until smooth.
- Stir in coconut milk and heat through, about 5 minutes.
- Serve hot.
Nutritional Value
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