This creamy Low FODMAP Butternut Squash Soup is made with diced butternut squash, carrots, potatoes, leek greens, and garlic-infused olive oil. The result is a smooth, savory, and slightly sweet meal that is gentle on your stomach. It makes a perfect cozy lunch or light dinner for four people during the fall and winter seasons.
Jump to RecipeLow FODMAP Butternut Squash Soup Ingredients
- 2 heaped cups peeled, diced butternut squash
- 1 medium carrot, sliced
- 1 small white potato, peeled and diced
- 1 cup chopped leek greens (green tops only, no white bulb)
- 3 tablespoons garlic-infused olive oil, divided
- 4 cups low FODMAP vegetable or chicken stock
- 1 cup lactose-free milk (or low FODMAP plant milk)
- 1/2 teaspoon dried thyme
- 1/2 teaspoon dried rosemary
- 1/4 teaspoon ground nutmeg (optional)
- Salt and freshly ground black pepper, to taste
- Optional toppings: Lactose-free yogurt, fresh chives, or toasted pumpkin seeds

How To Make Low FODMAP Butternut Squash Soup
- Prep the veggies: Peel and dice the butternut squash and potato into small cubes. Slice the carrot thinly and chop the green leek tops (discarding the white bulbs).
- Sauté the aromatics: In a large pot, heat 2 tablespoons of the garlic-infused oil over medium heat. Add the leek greens and a pinch of salt. Cook for 3–4 minutes until soft and fragrant.
- Add the vegetables: Stir the squash, carrot, and potato into the pot. Mix well to coat the vegetables in the flavored oil and leeks. Cook for another 2–3 minutes.
- Season and simmer: Add the dried thyme, rosemary, nutmeg, and black pepper. Pour in the stock and bring to a gentle boil. Reduce the heat to low and simmer for 20–25 minutes until the vegetables are very soft.
- Blend the soup: Turn off the heat. Use an immersion blender (stick blender) to puree the soup directly in the pot until smooth. If using a regular blender, blend in small batches carefully.
- Add the creaminess: Stir in the lactose-free milk and the remaining 1 tablespoon of garlic-infused oil. Heat gently on low for 2–3 minutes, but do not let it boil.
- Taste and serve: Taste the soup and add more salt or pepper if needed. Ladle into bowls and garnish with your favorite toppings like chives or pumpkin seeds.

Recipe Tips
- Use Leek Greens Only: The white bulb of the leek contains high amounts of fructans, which can upset sensitive stomachs. Using only the dark green leaves gives you onion flavor without the FODMAPs.
- Garlic-Infused Oil is Key: Real garlic cloves are high FODMAP, but the carbohydrates that cause issues do not dissolve in oil. Using strained garlic-infused oil adds safe, rich garlic flavor.
- Don’t Overboil the Milk: After adding your lactose-free milk or plant milk, only heat the soup gently. Boiling it vigorously can cause the milk to separate or curdle.
- Check Your Stock: Store-bought stocks often contain hidden onion or garlic powder. Always read the label to ensure it is FODMAP-friendly, or make your own at home.
What To Serve Butternut Squash Soup
This soup is light yet satisfying, making it a great centerpiece for a meal. Serve it with a slice of toasted gluten-free sourdough bread or low FODMAP crackers for dipping. For a more filling meal, pair it with a grilled chicken breast or a simple green salad with arugula, cucumber, and a maple-mustard dressing.
How To Store Butternut Squash Soup Leftovers
- Refrigerate: Let the soup cool completely, then store it in an airtight container in the refrigerator for up to 4 days.
- Freeze: Pour the cooled soup into a freezer-safe container or bag. It will stay fresh for up to 3 months. Leave a little space at the top of the container because the liquid will expand when frozen.

Low FODMAP Butternut Squash Soup Nutrition Facts
Serving Size: 1 bowl (approx. 1.5 cups)
- Calories: 185 kcal
- Total Fat: 11g
- Saturated Fat: 2g
- Cholesterol: 5mg
- Sodium: 650mg
- Total Carbohydrate: 19g
- Dietary Fiber: 4g
- Sugars: 5g
- Protein: 4g
Frequently Asked Questions
- Is this soup vegan? Yes, if you use vegetable stock and a plant-based milk option like almond milk or rice milk. Make sure your plant milk does not contain high FODMAP ingredients like inulin.
- Can I use frozen butternut squash? Yes, frozen squash is a great time-saver! Because frozen squash is usually blanched before freezing, it may cook slightly faster than fresh squash.
- What if I don’t have an immersion blender? You can use a standard countertop blender. Transfer the hot soup in small batches. Leave the lid vent open and cover it with a folded kitchen towel to let steam escape so pressure doesn’t build up.
Try More Recipes:
- Low FODMAP Black Bean Soup Recipe
- Low FODMAP Beef Stew Recipe
- Low FODMAP Beef and Barley Soup Recipe
Low FODMAP Butternut Squash Soup Recipe
Course: SoupsCuisine: American4
servings30
minutes40
minutes300
kcalThis creamy Low FODMAP Butternut Squash Soup features a rich blend of squash, carrots, and potatoes without any onion or garlic pieces. It uses garlic-infused oil and leek greens for maximum flavor that is safe for sensitive stomachs.
Ingredients
2 heaped cups peeled, diced butternut squash
1 medium carrot, sliced
1 small white potato, peeled and diced
1 cup chopped leek greens (green tops only)
3 tbsp garlic-infused olive oil, divided
4 cups low FODMAP vegetable or chicken stock
1 cup lactose-free milk (or low FODMAP plant milk)
1/2 tsp dried thyme
1/2 tsp dried rosemary
1/4 tsp ground nutmeg (optional)
Salt and black pepper, to taste
Directions
- Prep: Dice squash and potato, slice carrot, and chop leek greens.
- Sauté: Cook leek greens in 2 tbsp oil in a large pot for 3-4 minutes.
- Simmer: Add veggies, herbs, and stock. Simmer for 20-25 minutes until soft.
- Blend: Puree soup until smooth using an immersion blender.
- Finish: Stir in milk and remaining 1 tbsp oil. Heat gently and serve.
