Slowly caramelized onions give this blended butternut squash soup its depth. Allow the onions to become golden and caramelized before adding the squash.
Prep: 20 min | Cook: 1 hr | Yield: 4 servings
Allow the onions to become golden and caramelized before adding the squash.
Caramelized Onion Butternut Squash Soup
- Total Time: 1 hour 20 minutes
- Yield: 4 servings 1x
- Diet: Vegetarian
Description
Slowly caramelized onions give this blended butternut squash soup its depth.
Ingredients
- 2 tablespoons olive oil
- 2 large onions, sliced
- 4 cups butternut squash, peeled and cubed
- 4 cups vegetable broth
- 1 teaspoon salt
- 1/2 teaspoon black pepper
- 1/4 teaspoon nutmeg
- 1/4 teaspoon cinnamon
- 1 cup heavy cream or coconut cream (optional)
- Fresh herbs for garnish (e.g., thyme or parsley)
Instructions
- Heat olive oil in a large pot over medium heat.
- Add sliced onions and salt. Cook for 25-30 minutes, stirring occasionally, until golden brown and caramelized.
- Stir in cubed butternut squash and cook for an additional 5 minutes.
- Add vegetable broth to the pot and bring to a boil. Reduce heat and simmer for 25-30 minutes, or until squash is soft.
- Puree the soup using an immersion blender or transfer to a blender until smooth.
- Stir in black pepper, nutmeg, and cinnamon. Adjust seasoning to taste.
- If desired, stir in heavy cream or coconut cream for a richer flavor.
- Warm the soup through for a few more minutes over low heat.
- Ladle the soup into bowls and garnish with fresh herbs if desired.
Notes
- Use fresh butternut squash and onions for the best flavor.
- Experiment with additional spices like cumin or coriander.
- Garnish with toasted seeds or herbs for added visual appeal and flavor.
- Taste and adjust seasoning throughout the cooking process.
- Blend longer for a creamier soup consistency.
- This soup can be made vegan by using coconut cream and vegetable broth.
- For an extra layer of flavor, roast the butternut squash before adding it to the soup.
- Prep Time: 20 minutes
- Cook Time: 60 minutes
- Category: Soup
- Method: Stovetop, Blending
- Cuisine: American
Nutrition
- Serving Size: 1 serving
- Calories: 290 kcal
- Sugar: 15g
- Sodium: 700mg
- Fat: 14g
- Saturated Fat: 7g
- Unsaturated Fat: 7g
- Trans Fat: 0g
- Carbohydrates: 38g
- Fiber: 7g
- Protein: 3g
- Cholesterol: 25mg
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Why This Recipe Works
- Cook the sliced onions for 25-30 minutes, stirring occasionally.
- No. This recipe simmers cubed squash in vegetable broth.
- Allow the onions to become golden and caramelized before adding the squash.
Tips and Serving
Blend after simmering for 25-30 minutes, once the squash is soft. No. Heavy cream or coconut cream is optional in this recipe.

Storage
Keep this dish covered and refrigerate perishables promptly, within two hours. Use most cooked leftovers within three to four days, following USDA guidance.
Frequently Asked Questions
How long do the onions cook?
Cook the sliced onions for 25-30 minutes, stirring occasionally.
Is the squash roasted?
No. This recipe simmers cubed squash in vegetable broth.
When is the soup blended?
Blend after simmering for 25-30 minutes, once the squash is soft.
Is cream required?
No. Heavy cream or coconut cream is optional in this recipe.
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