Creamy Leek and Parsnip Soup with Garlic and Thyme

This warm, comforting bowl of leek and parsnip soup is both nourishing and flavorful. Caramelized leeks bring a gentle sweetness while parsnips add an earthy, slightly spicy note. Creamy oat milk and rich coconut milk create a silky texture without dairy, making this soup indulgent yet light. It’s an ideal choice for chilly evenings and busy weeknights when you want something quick, wholesome, and satisfying.

leek soup in a bowl

When temperatures drop, I often crave a simple, creamy soup that requires minimal fuss. While my butternut squash and leek soup is a favorite, this leek and parsnip soup ranks a close second. It’s dairy-free and vegan by default, but easy to adapt if you prefer traditional dairy ingredients.

💖Reasons to Love this Recipe

  • Family-friendly and comforting.
  • Vegan and dairy-free, with naturally gluten-free options.
  • Quick to prepare and full of savory, layered flavors.
  • Creamy and hearty without heavy cream, thanks to coconut and oat milks.
  • Nutritious and made with minimal, wholesome ingredients.

📃Ingredient Description

The following ingredients combine to make a silky, aromatic leek and parsnip soup. Exact measurements are provided in the recipe card below.

The ingredients for leek and parsnip soup on a flat surface.
  • Olive oil: Use a neutral extra virgin or light olive oil to sauté the vegetables.
  • Sweet onion: Sweet or white onions work best, cooked until translucent.
  • Shallots: Optional for extra flavor; skip if unavailable.
  • Leeks and parsnips: The stars of the soup—use cleaned, trimmed leeks (white and light green parts) and peeled or unpeeled parsnips.
  • Vegetable stock: Use good-quality stock for depth; water can be used in a pinch but season more aggressively.
  • Coconut milk and oat milk: Full-fat canned coconut milk adds richness, while oat milk lightens and smooths the texture. For a non-vegan variation, heavy cream works too.
  • Vegan cheese: Adds creaminess and umami; replace with regular cheese if not vegan.
  • Garlic and ginger: Fresh cloves and root give brightness and warmth; paste is an acceptable substitute.
  • Spices and herbs: Fresh thyme, ground coriander, garam masala, black pepper, and salt build the aromatic base.

Please refer to the recipe card for exact measurements and cook times.

💭Variations and Substitutions

If you want to change the flavor or accommodate available ingredients, try these substitutions:

  • Parsnip swap: Use turnips, carrots, or celeriac for a different root flavor and texture.
  • Dairy option: Replace plant milks and vegan cheese with full-fat cream and grated dairy cheese for a traditional version.
  • Herbs: Tarragon, oregano, or sage complement the leeks and parsnips well.

Note: Substitutions may alter texture and flavor but are useful for tailoring the dish to your pantry or diet.

How to Make Vegetarian Leek Soup

The full recipe card below lists step-by-step instructions. Here is a concise overview with helpful tips:

a process shot of how to make parsnip soup
adding the milk to the cooked parsnip.

Step 1: Heat oil in a heavy-bottomed pan and cook the chopped onion and shallots until soft. Add leeks, parsnips, garlic, ginger, and thyme. Sauté for a few minutes until fragrant.

Step 2: Stir in coriander, garam masala, and black pepper. Deglaze with vegetable stock, then add the remaining stock, coconut milk, and oat milk. Season with salt and simmer until the parsnips are tender.

Step 3: Purée the mixture until smooth using a blender or food processor; blend in batches if necessary. Adjust consistency with extra stock or milk if the soup is too thick.

If your blender cannot handle hot liquids, cool the soup slightly before blending.

Step 4: Return the puréed soup to a pot on low heat, stir in vegan cheese until melted, warm through, and serve garnished with fresh herbs or a drizzle of olive oil.

parsnip soup served with baguette.

Storage

Cool the soup completely, then store in an airtight container in the refrigerator for up to three days. Freezing is not recommended, as oat milk can separate and change the texture when thawed.

What Goes Well With Leek Soup?

Leek and parsnip soup pairs beautifully with crusty bread. Serve with French bread, garlic toast, dinner rolls, or a soft artisanal loaf for dipping. A simple green salad or roasted vegetables also complement the creamy soup.

Recipe FAQs

What part of the leek do you use for soup?

All parts of the leek are edible. The white and light green sections are most commonly used for soups because they are tender and mild. The darker green tops are more fibrous and are excellent for making stock or longer-simmered broths.

What do leeks pair well with?

Leeks pair well with root vegetables like potatoes, carrots, parsnips, and celery root, as well as mushrooms and tomatoes. Their sweet, onion-like flavor also complements herbs such as tarragon, chives, oregano, and thyme, and protein options like chicken or pork in non-vegan versions.

Love Soups? Here Are Other Soup Recipes To Try:

  • Butternut Squash and Carrot Soup
  • Duo Bean Tomato Basil Soup
  • Okro Soup
  • Creamed Cauliflower and Leek Soup

If you try this recipe, please consider leaving a rating and sharing your experience in the comments. Your feedback helps others discover simple, comforting recipes like this one.

PEACE & LOVE

Maureen

Disclosure: This post may contain affiliate links. If you purchase through those links, I may earn a small commission at no extra cost to you. Thank you for your support.

📖 Recipe

feature image for leek soup

Creamy Leek and Parsnip Soup

This leek and parsnip soup is quick, flavorful, and a lighter take on classic creamy leek soup. Vegan, dairy-free, and hearty—perfect for mid-week dinners paired with crusty bread.

Course: Sides, Soup, Starters
Cuisine: International
Diet: Gluten Free, Vegan
Prep Time: 10 minutes
Cook Time: 27 minutes
Total Time: 37 minutes
Servings: 4
Calories: 476.89 kcal (approx.)
Author: Maureen Celestine

Equipment

  • Heavy-bottomed pot or saucepan
  • Blender or immersion blender

Ingredients

  • 2 tablespoons olive oil
  • 1 small sweet onion, chopped
  • 3 shallots, chopped
  • 2 large leeks, cleaned, trimmed, and chopped (white and light green parts)
  • 1 lb parsnips, chopped (about 3)
  • 4 garlic cloves, minced
  • 1 inch fresh ginger, minced (about 1¼ tsp)
  • 2 fresh thyme sprigs, chopped
  • 1 teaspoon ground coriander
  • 1 teaspoon garam masala
  • 1 teaspoon black pepper
  • 2 cups vegetable stock
  • 1¼ cups canned coconut milk (from one 15 oz can)
  • ¾ cup oat milk
  • 1¼ teaspoons salt, or to taste
  • ¾ cup vegan cheese (or substitute dairy cheese)

Instructions

  1. Heat the oil in a heavy-bottomed pan. Add the chopped onion and shallots and cook over medium heat for about 3 minutes, stirring occasionally to prevent browning.
  2. Add the chopped leeks, parsnips, minced garlic, minced ginger, and thyme. Sauté for another 10 minutes, stirring frequently until vegetables begin to soften.
  3. Stir in ground coriander, garam masala, and black pepper. Cook for about 4 more minutes to toast the spices.
  4. Deglaze the pan with one cup of vegetable stock, scraping up any browned bits. Add the remaining stock, coconut milk, and oat milk. Season with salt and simmer for about 10 minutes until parsnips are tender.
  5. Remove from heat and allow to cool slightly if needed. Blend the mixture until smooth in a blender or with an immersion blender. Work in batches if necessary. Adjust thickness with extra stock or milk as desired.
  6. Return the puréed soup to a clean pot, warm over low heat, and stir in the vegan cheese until fully melted and incorporated.
  7. Ladle into bowls, garnish with fresh herbs, a drizzle of olive oil, or chives, and serve hot.

Notes

If using a small blender, purée in batches and take care when blending hot liquids. If the soup is too thick, thin with additional stock or milk. Store refrigerated up to three days.

Nutrition (per serving, approximate)

Calories: 476.89 kcal | Carbohydrates: 43.68 g | Protein: 9.53 g | Fat: 32.67 g | Fiber: 8.62 g | Sugar: 14.9 g | Iron: 6.61 mg

I hope you try this leek and parsnip soup and enjoy its creamy, savory comfort. If you make the recipe, please share your experience and any tweaks you tried. Happy cooking!

Leek soup: FAQ

What does leek soup taste like?

Leek soup is rich, creamy, and warming. Without potatoes, this version relies on parsnips for body and sweetness, giving the soup a slightly sweet, onion-like flavor with a subtle earthy bite. The coconut and oat milks create a smooth, velvety texture while the spices add depth and warmth.

Can you eat the green part of leeks?

Yes. The green parts are edible and flavorful. The darker green tops are firmer and are excellent for stocks or long-cooked dishes, while the lighter greens are tender enough for soups and stews.