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Why This Recipe Works
- Silky Without Cream: A single Yukon gold potato gives luxurious body so you can skip the dairy.
- Two-Stage Sweetness: Roasting half the carrots intensifies their sugars while simmering the rest keeps the flavor bright.
- Rosemary-Infused Oil: A quick sizzle of fresh rosemary in olive oil blooms the herb’s piney notes and doubles as a gorgeous drizzle.
- Blender-Safe Hot Liquid: We use a towel-covered lid vent so you can purée straight from the pot—no waiting, no splatter.
- Make-Ahead Friendly: Flavors meld overnight; simply thin with broth when reheating.
- Freezer-Ready Portions: Freeze in muffin tins for single-serve cubes that thaw in minutes.
Ingredients You'll Need
Great soup starts with great produce. Look for butternut squash that feels heavy for its size, with matte, unblemished skin. The neck should be long and thick—this is the seedless part that yields the most flesh. Choose carrots that are slender and firm; avoid the “baby” bagged ones, which are often woody cores disguised in orange. Fresh rosemary should be springy and aromatic; if it bends without snapping and smells like Christmas, you’ve found a winner.
Butternut Squash: One large squash (about 3 lb) yields roughly 7 cups cubed. If you’re short on time, many stores sell pre-peeled, pre-cubed squash. It’s more expensive but still delicious.
Carrots: I mix orange and rainbow carrots for color complexity, but any variety works. Peel only if the skins are thick; otherwise, a good scrub is enough.
Yukon Gold Potato: A small starchy potato acts as a natural thickener. Russets dissolve too quickly; red potatoes are too waxy. If you’re avoiding nightshades, substitute ½ cup soaked cashews.
Fresh Rosemary: One generous sprig infuses the broth; a second sprig becomes the crunchy garnish. In a pinch, ½ tsp dried rosemary can simmer in the soup, but fresh for the oil is non-negotiable.
Vegetable Broth: Use low-sodium so you control salt. Chicken broth works for omnivores; water plus a bouillon cube is fine in a hurry.
White Miso: Just 1 tablespoon adds incredible umami depth. If you avoid soy, substitute 1 tsp tamari or coconut aminos.
Apple Cider Vinegar: A splash at the end brightens all the sweet vegetables. Lemon juice works too, but I love the autumnal note of cider vinegar.
How to Make Creamy Butternut Squash and Carrot Soup with Fresh Rosemary
Roast Half the Carrots
Preheat oven to 425 °F (220 °C). Peel and cut 4 carrots into 2-inch chunks; toss with 1 Tbsp olive oil, ½ tsp salt, and a few grinds of pepper. Spread on a parchment-lined sheet pan and roast 18–20 minutes until edges caramelize and a kitchen smells like candy. This concentrates sweetness and adds roasty depth to the finished soup.
Sauté Aromatics
While carrots roast, warm 2 Tbsp olive oil in a heavy Dutch oven over medium heat. Add 1 diced onion and cook 5 minutes until translucent. Stir in 2 minced garlic cloves and 1 Tbsp finely chopped fresh rosemary leaves; cook 60 seconds until fragrant but not browned. The oil will turn herbaceous and your kitchen will smell like November.
Build the Base
Add 7 cups cubed butternut squash, the remaining 4 raw carrots sliced into coins, 1 peeled Yukon gold potato diced small, 1 tsp kosher salt, ½ tsp pepper, and ¼ tsp freshly grated nutmeg. Stir to coat in the fragrant oil. Let vegetables sweat 5 minutes; this draws out moisture and intensifies flavor.
Deglaze & Simmer
Pour in 4 cups hot vegetable broth, scraping browned bits. Add 1 whole rosemary sprig and 1 bay leaf. Bring to a boil, reduce to low, cover partially, and simmer 20 minutes until vegetables are fork-tender. Remove bay leaf and rosemary stem (leaves will have fallen off).
Add Roasted Carrots
Tip the caramelized carrot coins into the pot along with 1 Tbsp white miso. Stir to dissolve miso. The roasted carrots lend a smoky sweetness that balances the squash’s mellow richness.
Blend Until Silk-Smooth
Working in batches, transfer soup to a blender. Remove center cap from lid, cover with a kitchen towel, and blend starting on low, increasing to high, 60–90 seconds until velvety. Return to pot. Alternatively, use an immersion blender; tilt pot so head is submerged to avoid splatter.
Adjust Consistency
Soup should coat the back of a spoon. Thin with up to 1 cup additional broth or water. Taste; add more salt, pepper, or nutmeg as needed. Stir in 1 tsp apple cider vinegar for brightness.
Make Rosemary Oil Drizzle
In a small skillet, warm 3 Tbsp extra-virgin olive oil over medium heat. Add 1 sprig rosemary; fry 45–60 seconds until leaves crisp but stay green. Remove sprig; crumble leaves over soup. Swirl fragrant oil into each bowl just before serving.
Expert Tips
Heat Control
Keep the sauté gentle; scorched garlic or rosemary will turn bitter and dominate the soup.
Blender Safety
Never fill blender more than two-thirds full with hot liquid; steam needs an escape route.
Overnight Upgrade
Soup thickens as it cools; refrigerate up to 4 days and thin with broth when reheating.
Freeze Smart
Cool completely, then freeze in labeled zip bags laid flat for quick stacking.
Color Pop
Reserve a few roasted carrot coins to float on top for restaurant-worthy presentation.
Vegan Protein
Stir in a can of rinsed white beans before serving for extra staying power.
Variations to Try
- Spicy Kick: Add ½ tsp smoked paprika and a pinch of cayenne with the onions.
- Coconut Glow: Replace 1 cup broth with full-fat coconut milk and finish with lime zest.
- Apple & Sage: Swap rosemary for sage and add 1 diced apple with the vegetables.
- Curried Comfort: Stir in 1 Tbsp Thai red curry paste and finish with cilantro instead of rosemary oil.
- Roasted Garlic: Roast a whole head of garlic, squeeze cloves into the blender for deeper sweetness.
- Grain Bowl Base: Serve thick soup over farro or quinoa, topped with pepitas and goat cheese.
Storage Tips
Refrigerator: Cool soup completely, transfer to airtight containers, and refrigerate up to 4 days. Flavors meld and improve overnight.
Freezer: Ladle cooled soup into silicone muffin trays; freeze until solid, then pop out and store in a freezer bag up to 3 months. Thaw overnight in fridge or reheat gently from frozen with a splash of broth.
Reheating: Warm over medium-low heat, stirring occasionally. Thin with broth or water until silky. Avoid boiling to preserve vibrant color.
Frequently Asked Questions
Creamy Butternut Squash and Carrot Soup with Fresh Rosemary
Ingredients
Instructions
- Roast Carrots: Preheat oven to 425 °F. Toss 4 carrots (cut into chunks) with 1 Tbsp oil, salt, and pepper. Roast 18–20 min until caramelized.
- Sauté Base: In a Dutch oven, warm remaining 1 Tbsp oil. Cook onion 5 min. Add garlic and chopped rosemary; cook 1 min.
- Simmer Veggies: Stir in squash, raw carrots (sliced), potato, nutmeg, salt, pepper, and bay leaf. Add broth; simmer covered 20 min until tender.
- Blend: Remove bay leaf. Add roasted carrots and miso. Blend in batches until silky. Return to pot; thin as needed.
- Finish: Stir in vinegar. Heat 3 Tbsp olive oil with remaining rosemary sprig 45 sec; drizzle over bowls.
Recipe Notes
Soup thickens on standing; thin with broth when reheating. Freeze in muffin tins for single-serve portions.
