Cozy Fall Butternut Squash Soup (High Protein & Dairy-Free)
A velvety, golden butternut squash soup that feels indulgent but is dairy-free and high in plant protein. Roasting the squash and carrots deepens the flavor and gives the soup that picture-perfect color. A scoop of unflavored plant protein keeps you full without changing the taste. Finish with crunchy sourdough croutons and fresh thyme for a cozy fall bowl that reheats beautifully for meal prep.
Equipment
- Baking sheet (rimmed) lined with parchment or Silpat
- Large mixing bowl or sheet for tossing vegetables
- Sharp chef’s knife and sturdy peeler
- High-speed blender or immersion blender
- Large stockpot (6 qt) or Dutch oven
- Measuring cups and spoons
- Small bowl for croutons
- Spatula and wooden spoon
Ingredients
For the Soup
- 1 medium butternut squash (about 2.5 to 3 lb), peeled, seeds removed, cut into 1-inch cubes (about 4 to 5 cups)
- 1 large carrot peeled and chopped (about 1 cup)
- 1 small yellow onion, rough chopped
- 4 whole garlic cloves, unpeeled (see roasting note)
- 2 tbsp olive oil (for roasting)
- 3 cups low-sodium vegetable broth (add more to adjust consistency)
- 1 cup unsweetened almond milk (or oat milk)
- 1 scoop unflavored plant-based protein powder (pea or soy; about 20–25 g protein per scoop)
- 1 tsp fine sea salt, plus more to taste
- ½ tsp freshly ground black pepper, plus more to taste
- ½ tsp ground cinnamon
- ¼ tsp ground nutmeg (optional)
- 1 tsp Optional: pure maple syrup or honey (only if you like a slightly sweeter finish)
For the Croutons
- 1 slice rustic sourdough or country bread, cut into 1/2-inch cubes (about 1 to 1 1/2 cups cubes)
- 1 tbsp olive oil
- pinch of salt and pepper
Garnish
- Fresh thyme sprigs or leaves
- Extra cracked black pepper
- Drizzle of olive oil or pumpkin seed oil (optional)
- Roasted pumpkin seeds or roasted chickpeas for extra crunch and protein (optional)
Instructions
Prepare the squash safely (5–8 minutes)
- Place the squash on a cutting board. Cut off both ends so you have flat surfaces. Stand the squash upright on a flat end and, using a sharp chef’s knife, slice down the middle lengthwise. Scoop out the seeds with a spoon. Lay each half flat and peel with a heavy-duty vegetable peeler, or carefully slice off the peel with the knife. Cut into 1-inch slabs, then into 1-inch cubes. If you find the squash too hard to cut, microwave the whole squash for 1 to 2 minutes to soften it slightly; let cool before handling.
Preheat and arrange for roasting (3 minutes)
- Preheat oven to 400°F (200°C). Line a rimmed baking sheet with parchment. Arrange the cubed butternut squash, chopped carrot, and chopped onion in a single layer on the sheet with a little space between pieces so they roast rather than steam.
Toss with oil and seasoning (1 minute)
- Drizzle 2 tablespoons olive oil over the vegetables. Sprinkle 1 teaspoon sea salt and 1/4 teaspoon black pepper. Toss with your hands or a spatula until everything is lightly and evenly coated. Tuck the unpeeled garlic cloves into the center of the pan or place them on a small piece of foil and fold into a little packet so they roast without burning.
Roast until caramelized (25–30 minutes)
- Roast at 400°F for 25 to 30 minutes, flipping vegetables halfway through at about 12–15 minutes. Look for golden brown edges and fork-tender squash. The caramelization is what creates the deep, rich flavor and the intense orange color in the finished soup.
Remove garlic and cool slightly (2–3 minutes)
- Remove the garlic packet or pick up the roasted cloves and let them cool for 2 minutes, then squeeze the softened garlic from its skins. Let all vegetables cool just enough that hot steam will not pop in the blender, about 3 to 5 minutes.
Combine roasted vegetables and liquids in blender (2 minutes)
- Transfer the roasted squash, carrots, onion, and peeled roasted garlic into a high-speed blender. Add 3 cups vegetable broth, 1 cup unsweetened almond milk, 1/2 teaspoon cinnamon, and 1/4 teaspoon nutmeg if using. If using a blender with a small opening in the lid, remove the center cap and cover with a folded kitchen towel to allow steam to escape.
Blend in safe batches until totally smooth (1–3 minutes per batch)
- Blend on low to start, then increase to high. If your blender is small, blend in two batches. Hot liquids expand when blended; always vent the blender and hold the lid with a towel. Blend until silky and uniform with no visible pieces.
Add protein powder carefully so it does not clump (30–45 seconds)
- To avoid lumps, make a smooth slurry: measure 1 scoop unflavored plant protein into a small bowl and whisk with 2 to 3 tablespoons warm broth from the blender until smooth. Add the slurry back into the blended soup and pulse the blender 2 to 3 times, or whisk into the pot after transferring. If using an immersion blender, add the dry scoop in small amounts while blending so it disperses evenly.
Transfer to pot and warm gently (5–10 minutes)
- Pour the blended soup into a large stockpot or Dutch oven. Warm over medium-low heat, stirring frequently, until the soup reaches a gentle simmer. Simmer 5 to 10 minutes to marry flavors. Taste and adjust salt and pepper. If the soup is too thick, stir in up to 1 cup additional broth or almond milk until you reach desired consistency.
Make the croutons while soup finishes (8–10 minutes)
- Toss bread cubes with 1 tablespoon olive oil and a pinch of salt and pepper. Spread on a small baking sheet and bake at 375°F for 8 to 10 minutes, stirring once halfway, until golden and crisp. Alternatively, air-fry at 350°F for 5 to 7 minutes, shaking basket once. Remove from oven and let cool; croutons will crisp up further as they cool.
Final taste and texture check (1–2 minutes)
- Re-taste the soup. Add more salt if needed, a little extra cinnamon for warmth, or a splash of lemon juice to brighten. If you want the soup silkier, blend again for 10 to 15 seconds.
Serve and garnish (1 minute)
- Ladle soup into white bowls for the photo-perfect look. Top each bowl with a handful of crunchy croutons, a sprinkle of fresh thyme leaves, a crack of black pepper, and a light drizzle of olive oil or pumpkin seed oil if desired. Add roasted chickpeas or pumpkin seeds for extra texture and protein if you like.
Leftover handling and reheating note
- If steaming or reheating later, warm gently over low heat and stir often. If the soup thickened in the fridge, add a splash of broth or almond milk while reheating. Whisk or use an immersion blender briefly to restore smoothness.
Notes
- Cutting the squash: Use a sharp chef’s knife and stable cutting board. If you are nervous about cutting raw squash, microwave a whole squash for 60 to 90 seconds to soften slightly. Let it cool before cutting.
- Roasting garlic: Roasted garlic becomes sweet and mellow. Leave cloves unpeeled when roasting and squeeze the soft garlic out after cooling. If you prefer more roasted garlic flavour, add an extra clove.
- Blending hot liquids: Never fully seal the blender lid when blending hot soup. Hold with a towel and vent to avoid pressure build up. An immersion blender is a safe alternative.
- Protein incorporation: Make a slurry with a few tablespoons of warm soup before adding protein powder to the whole batch to prevent clumping. Pea and soy protein work best for neutral flavor. Rice protein may be grainy. If using collagen peptides, note they are not vegan.
- Adjusting sweetness: Roasted squash adds natural sweetness. If you want it slightly sweeter, stir in 1 teaspoon of maple syrup after blending.
- Spice variations: Add 1/2 teaspoon smoked paprika or 1/8 teaspoon cayenne for a smoky or spicy kick.
- For extra creaminess without protein powder: Blend in 1/2 cup silken tofu or 1/2 cup drained white beans for a protein boost and ultra-smooth texture. These change mouthfeel slightly but are excellent dairy-free options.
- Make it gluten-free: Use gluten-free bread for croutons or skip them and top with roasted pumpkin seeds.
- Leftover behavior: The soup may thicken in the fridge. Stir in liquid and whisk or re-blend when reheating. Freezing can slightly change texture if heavy protein or dairy is present. Re-blend after thawing if needed.
Make-Ahead, Storage, and Freezing
- Refrigerator: Cool completely. Store in airtight glass containers for up to 4 to 5 days.
- Freezer: Portion into freezer-safe containers or silicone freezer cubes and freeze up to 3 months. Leave 1/2 inch headspace in containers for expansion.
- To reheat from frozen: Thaw in the fridge overnight, then warm slowly on the stove over low heat. Add a splash of broth or almond milk if thick. Whisk or re-blend briefly to restore texture.
- Meal prep tips: Double the recipe and portion into single-serving jars for grab-and-go lunches. Add croutons or seeds at serving time so they stay crisp
Substitutions and Variations
- Protein swap: Use 1/2 cup silken tofu or 1/2 cup drained white beans instead of protein powder for whole-food protein.
- Creaminess swap: Use canned light coconut milk for a slightly richer dairy-free version. This will add coconut flavour.
- Non-vegan option: Stir in shredded rotisserie chicken or cooked turkey for extra protein and heartiness.
- Low FODMAP: Use garlic-infused oil instead of garlic cloves and green parts of scallions instead of onion. Use low-FODMAP bouillon.
- To make it spicy: Add 1/8 to 1/4 teaspoon cayenne or a swirl of hot sauce at the end.