Roasted butternut squash soup starts in the oven, where cubes of squash develop golden edges before they are blended with onion, garlic, vegetable broth and sage. The squash gives the soup its smooth body without flour or heavy cream. A small splash of apple cider vinegar balances its sweetness, and toasted pumpkin seeds add a little crunch if you want a topping.
Serve it with crusty bread for lunch, or pair smaller bowls with a salad or sandwich. You can adjust the broth at the end for a thick, spoonable soup or a lighter consistency.
Ingredients
- 2½ pounds peeled, seeded butternut squash, cut into approximately 1-inch cubes. Weigh the prepared squash; the weight of a whole squash includes its peel and seeds.
- 3 tablespoons olive oil, divided between roasting and the soup pot.
- 1 medium yellow onion, diced.
- 3 garlic cloves, minced.
- 4 cups low-sodium vegetable broth, plus a little extra if needed to thin the soup.
- ½ teaspoon dried rubbed sage.
- ½ teaspoon fine salt, divided, plus more to taste after adding the broth.
- ¼ teaspoon freshly ground black pepper, plus more to taste.
- 1 teaspoon apple cider vinegar, with additional vinegar added only after tasting.
- 2 tablespoons toasted pepitas, optional, for serving.
Use broth with a flavor you like, because it becomes part of the finished soup. Its salt level also determines how much seasoning you need. Keep the squash cubes close in size so they soften at roughly the same time.
How to Make Roasted Butternut Squash Soup
1. Roast the squash
Heat the oven to 400°F. Toss the prepared squash with 2 tablespoons olive oil and ¼ teaspoon salt. Spread it in a single layer on a large rimmed baking sheet; use a second sheet if necessary to avoid crowding.
Roast for 35–45 minutes, turning once, until the squash is very tender and some edges are golden. A fork should slide into the cubes easily. Use tenderness as the final cue rather than stopping at a fixed minute.
2. Cook the onion and garlic
While the squash roasts, heat the remaining tablespoon of oil in a large soup pot over medium heat. Add the onion and cook for 8–10 minutes, stirring, until softened. Add the garlic, sage and pepper; stir for about 1 minute without letting the garlic burn. If the squash is not ready, remove the pot from the heat while you wait.
3. Add the broth and roasted squash
Add the roasted squash and broth to the pot. Bring to a gentle simmer and cook for about 5 minutes, stirring to combine the vegetables and broth. If the soup looks too thick for your blender, add a small splash of extra broth.
4. Blend until smooth
Remove the pot from the heat. Use an immersion blender with its blade fully submerged to reduce splashing. Blend until the soup is smooth.
For a countertop blender, let the mixture cool slightly and follow the appliance's instructions for hot liquids. Blend in small batches, vent the lid as instructed and never fill the jug beyond its hot-liquid limit. Return the soup to the pot afterward.
5. Adjust and serve
Stir in 1 teaspoon apple cider vinegar. Taste, then add the remaining ¼ teaspoon salt only if needed. Adjust the pepper, vinegar and broth a little at a time. Gently warm the soup if blending has cooled it, and serve with optional toasted pepitas.
Tips for Texture and Flavor
Roast until fully tender. Firm squash can leave a grainy puree. If a fork meets resistance, give the cubes a few more minutes in the oven.
Leave space on the baking sheet. A crowded sheet traps moisture. Spread the cubes across two sheets rather than piling them together.
Thin after blending. Start with the measured broth, then add small amounts to reach the consistency you prefer. Extra liquid changes the yield.
Season after the broth is added. Both squash sweetness and broth salinity vary. The vinegar is a finishing adjustment, not a reason to skip tasting.
Serving Ideas
Pair a bowl with toast, a simple green salad or a grilled cheese sandwich. For a lighter first course, serve smaller portions. Pepitas are optional; leave them off if they do not suit the people at your table.
Storage and Reheating
Divide leftovers into shallow containers and refrigerate promptly, within 2 hours, or within 1 hour if the room or outdoor temperature is above 90°F. Do not leave a large pot out until it reaches room temperature. Keep refrigerated leftovers for 3–4 days.
Reheat while stirring until the soup reaches 165°F throughout. Add a little broth if it has thickened. Freeze portions for longer storage and thaw them in the refrigerator before reheating. These handling instructions follow USDA food-safety guidance.
Frequently Asked Questions
Can I use pre-cut butternut squash?
Yes. Measure 2½ pounds of peeled, seeded cubes and cut any large pieces down to a similar size. Roasting time still depends on tenderness and the size of the pieces.
Does this recipe need cream?
No. The blended squash supplies the body. This version uses vegetable broth and olive oil without dairy. Check the packaged broth and any accompaniments if you need to avoid a specific ingredient.
Can I make it ahead?
Prepare the soup, divide it into shallow containers and refrigerate promptly. Reheat using the temperature guidance above and adjust its consistency with broth before serving.
Why is my soup too thick?
The squash-to-liquid ratio and evaporation both affect thickness. Stir in warm broth a little at a time, then taste and adjust the seasoning.
Recipe at a Glance
Yield: approximately 6 servings. Estimated prep: 15 minutes. Estimated cook: 50 minutes. Estimated total: 65 minutes. Cook the onion while the squash roasts; actual timing and yield depend on the squash, oven and final broth adjustment.
Roasted Butternut Squash Soup
Equipment
- Rimmed baking sheets
- Large soup pot
- Immersion blender or hot-liquid-compatible countertop blender
Ingredients
Soup
- 2.5 lb butternut squash peeled, seeded weight; cut into 1-inch cubes
- 3 tablespoons olive oil divided
- 1 medium yellow onion diced
- 3 cloves garlic minced
- 4 cups low-sodium vegetable broth plus extra to thin if needed
- 0.5 teaspoon dried rubbed sage
- 0.5 teaspoon fine salt divided; adjust after tasting
- 0.25 teaspoon black pepper plus more to taste
- 1 teaspoon apple cider vinegar adjust after tasting
- 2 tablespoons toasted pepitas optional garnish
Instructions
Method
- Heat oven to 400°F. Toss squash with 2 tablespoons oil and ¼ teaspoon salt. Spread in one layer on one or two rimmed baking sheets. Roast 35–45 minutes, turning once, until fork-tender and golden at some edges.
- Meanwhile, heat remaining oil in a soup pot over medium heat. Cook onion 8–10 minutes until soft; stir in garlic, sage and pepper for 1 minute. Remove pot from heat if waiting for squash.
- Add roasted squash and broth. Bring to a gentle simmer and cook about 5 minutes.
- Remove from heat and blend with an immersion blender, keeping its blade submerged. For a countertop blender, follow the appliance hot-liquid directions: cool slightly, use small batches and vent as instructed. Return to pot.
- Stir in vinegar. Taste before adding remaining salt; adjust broth, pepper and vinegar gradually. Gently warm if needed. Serve with optional pepitas.