Caramelized Onion Butternut Squash Soup

This creamy and flavorful Caramelized Onion Butternut Squash Soup is a perfect fall or winter dish, offering a rich depth of flavor from the slow-cooked onions and the natural sweetness of butternut squash. With just a few simple ingredients and the addition of bone broth for protein, this soup is both nourishing and satisfying. It can be made quickly in an Instant Pot or on the stovetop, making it a versatile choice for any occasion. It’s also Whole30 compliant and paleo-friendly.

Full Recipe:

Ingredients

  • 1 medium onion, diced

  • 3 tablespoons extra virgin olive oil

  • 4 cloves garlic, minced

  • 2 carrots, diced

  • 2 stalks of celery, diced

  • 4 cups bone broth (chicken, beef, or pork)

  • 2 to 2 ½ pounds butternut squash, peeled and cut into 1 ½-inch cubes (about 4 cups)

  • ¼-½ tsp pepper

  • Salt to taste (approximately 2 ½ teaspoons Himalayan pink salt)

Directions

Instant Pot Directions:

  1. Caramelize the Onions: Set your Instant Pot to the “normal” sauté level. Add olive oil and onions, stirring occasionally. Once the onions start to brown, reduce the heat to the “less” level and continue cooking, stirring occasionally for 45-60 minutes.

  2. Cook the Soup: Add garlic, carrots, celery, butternut squash, and bone broth. Seal the lid and set the pressure cooker to high for 10 minutes. After the timer goes off, manually release the pressure and remove the lid.

  3. Blend the Soup: Use an immersion blender or transfer the soup to a blender to puree until smooth.

  4. Simmer: Return the pureed soup to the pot and simmer on low heat for 10-15 minutes, adding salt and pepper to taste.

Stovetop Directions:

  1. Caramelize the Onions: Heat olive oil in a large pot over low to medium heat. Add onions and cook, stirring occasionally, for 45-60 minutes until golden brown and caramelized.

  2. Cook the Soup: Add garlic, carrots, celery, butternut squash, and bone broth. Bring to a boil, then reduce to a simmer for 15-20 minutes until the squash is soft.

  3. Blend the Soup: Puree the soup with an immersion blender or in a regular blender until smooth.

  4. Simmer: Return the pureed soup to the pot and simmer for an additional 30 minutes. Season with salt and pepper to taste.

Nutrients

While exact nutritional values aren’t provided, here’s an estimated breakdown per serving (assuming 4 servings):

  • Calories: 180-220 kcal

  • Protein: 6g

  • Fat: 10g

    • Saturated Fat: 1g

  • Carbohydrates: 28g

    • Fiber: 6g

    • Sugar: 7g

  • Sodium: 900-1000mg

  • Cholesterol: 25mg

  • Potassium: 800mg

This Caramelized Onion Butternut Squash Soup is a comforting, nourishing dish that’s perfect for any cozy evening, and it pairs beautifully with fresh bread or a simple salad!

The Key Ingredients: Sweetness, Depth, and Richness

At the heart of this soup are just a few ingredients that come together to create an amazing depth of flavor. The butternut squash provides a naturally sweet and creamy base for the soup. When roasted or cooked, butternut squash develops a mild sweetness that balances perfectly with the savory elements in the soup. It also has a smooth, silky texture that gives the soup its rich consistency when blended.

The onions are another key ingredient, and their caramelization brings an incredible depth of flavor. Caramelized onions have a natural sweetness that adds complexity to the soup, transforming what could be a simple vegetable soup into something special. The slow cooking process allows the onions to release their natural sugars, creating a rich, savory base that complements the squash.

Garlic, carrots, and celery bring in additional layers of flavor, contributing a subtle earthiness and sweetness that enrich the overall profile of the soup. These vegetables are often referred to as the “holy trinity” in cooking because they form the foundation of many savory dishes.

Finally, the bone broth (chicken, beef, or pork) adds a depth of savory umami and rich protein, which makes the soup more substantial and nourishing. The broth ties all the ingredients together, creating a full-bodied, flavorful base.

Cooking Methods: Instant Pot vs. Stovetop

This recipe offers two cooking methods: one for the Instant Pot and one for the stovetop. Both methods will yield a delicious result, but the choice comes down to your available time and desired convenience.

Instant Pot Method:

The Instant Pot method is a great option for those looking to make this soup quickly without sacrificing flavor. You start by caramelizing the onions in the Instant Pot using the sauté function. The onions cook for 45-60 minutes, allowing them to release their natural sweetness. Once the onions are caramelized, you add the remaining ingredients—garlic, carrots, celery, butternut squash, and bone broth—then seal the lid and set the pressure cooker to high for 10 minutes. After the cooking time is complete, you manually release the pressure and remove the lid.

The soup is then blended using an immersion blender or regular blender until smooth. To finish, you simmer the pureed soup for 10-15 minutes on low heat, allowing the flavors to meld together. The Instant Pot method is quick, efficient, and perfect for busy nights when you want a rich, flavorful soup in a fraction of the time it would take on the stovetop.

Stovetop Method:

The stovetop method is more traditional and requires a little more attention, but it results in a beautifully rich and deep-flavored soup. First, you caramelize the onions in a large pot over low to medium heat for 45-60 minutes. After the onions have browned and become sweet and tender, add the garlic, carrots, celery, butternut squash, and bone broth to the pot. Bring the mixture to a boil, then reduce the heat and simmer for 15-20 minutes until the squash is soft and fully cooked.

After simmering, you can use an immersion blender or transfer the soup to a regular blender to puree it until smooth. Once pureed, return the soup to the pot and simmer for an additional 30 minutes to allow the flavors to develop even further. The stovetop method gives you more control over the cooking process and allows the flavors to develop slowly.

Blending the Soup: Smooth and Creamy Texture

Once the soup has been cooked, the next step is blending. Using an immersion blender is the easiest way to achieve a smooth and creamy texture directly in the pot. If you don’t have an immersion blender, a regular blender works just as well—just make sure to blend in batches if needed. The soup should be velvety and smooth, without any lumps, allowing the creamy butternut squash and caramelized onions to shine through.

Blending the soup not only gives it a creamy consistency but also helps to bring all the flavors together, creating a cohesive and rich taste. The smooth texture contrasts wonderfully with the slight crunch from the carrots and celery, which remain tender after simmering.

Final Seasoning and Adjustments

Once the soup is blended, it’s important to taste and adjust the seasoning. Since this recipe uses bone broth, it can already have a fair amount of salt, so it’s crucial to taste before adding more salt. You’ll likely want to add a touch of pepper for seasoning, and you can adjust the amount of salt to taste—around 2 ½ teaspoons of Himalayan pink salt is typically used, but this will depend on the saltiness of the broth.

You can also add more lemon juice if you like a bit of acidity to balance out the richness, or you can adjust the spice levels if you prefer a bit of heat, although the original recipe doesn’t call for spice.

Serving Suggestions: Pairing with Sides

This Caramelized Onion Butternut Squash Soup is hearty and flavorful enough to stand alone, but it pairs beautifully with a variety of sides to create a more complete meal. A crusty bread or garlic toast would complement the soup perfectly, adding some crunch and extra flavor. The soup is also great with a simple salad, like arugula or spinach, tossed with a light vinaigrette to balance the richness of the soup.

For an added protein boost, you could serve the soup with some grilled chicken, shredded pork, or even crispy bacon sprinkled on top for a savory contrast. The natural sweetness of the soup pairs beautifully with the salty and smoky flavors of these proteins.

Health Benefits and Nutritional Information

This Caramelized Onion Butternut Squash Soup is not only delicious but also packed with nutrients. The butternut squash provides vitamin A and fiber, making it a great choice for supporting vision and digestion. The bone broth is rich in collagen and protein, which can help support joint health and promote gut health. The soup is naturally paleo-friendly and Whole30 compliant, making it suitable for many different dietary preferences.

In terms of calories, this soup is relatively light while still being filling. The olive oil used in cooking adds healthy fats, while the carrots and celery provide additional vitamins and minerals. This soup is low in carbohydrates and high in fiber, making it a great choice for anyone looking for a healthy, satisfying dish.

Conclusion

In conclusion, Caramelized Onion Butternut Squash Soup is the perfect fall or winter dish, offering a combination of sweet, savory, and rich flavors. The caramelized onions, earthy squash, and nourishing bone broth come together to create a warm, comforting meal that is both satisfying and healthy. Whether you choose to make it in the Instant Pot for a quick meal or on the stovetop for a more traditional approach, this soup is easy to prepare and packed with flavor.

It’s a wonderful addition to any meal and is sure to be a crowd-pleaser, perfect for cozy nights, holiday dinners, or anytime you need a comforting, flavorful dish. The combination of rich, creamy texture and deep flavors makes this soup a standout, and it will surely become a go-to recipe in your fall and winter meal rotation.

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