When summer temperatures rise, this Chilled Zucchini and Leek Soup is exactly the kind of dish you want to have waiting in the fridge. Made with whole zucchini, tender leeks, Greek yogurt, and a touch of dried spearmint, it is light, fresh, and naturally packed with vegetables. Served cold, it makes a refreshing Spanish-style appetizer for hot summer days.

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Chilled Zucchini and Leek Soup: A Light Spanish Summer Appetizer

Name: Chilled Zucchini and Leek Soup: A Light Spanish Summer Appetizer
Prep time: 10 min
Cook time: 25 min
Total time: 2 h 35 min
Cuisine: Mediterranean
Ingredients: 2 medium zucchini (500g / 1.1lb); 3 medium leeks (300g / 10.5oz); 1 container Greek yogurt (125g / 4.4oz); ½ tbsp spearmint / hierbabuena, dried (or 4–5 fresh leaves); 750ml water (3¼ cups); 2 tbsp extra virgin olive oil (30ml / 1 fl oz); Fine salt; Ground black pepper

Chilled Zucchini and Leek Soup cocktail appetizer

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Why This Chilled Zucchini Soup Belongs in Your Summer Kitchen

Zucchini is one of those wonderfully generous summer vegetables that can keep producing faster than you can cook it. If you grow your own, you probably know the feeling: at some point, you are looking for new ways to use yet another zucchini before it finds its way into every dish on the table.

This Chilled Zucchini and Leek Soup is a delicious answer to that summer abundance. It uses a generous amount of seasonal zucchini together with tender leeks, Greek yogurt, and a little dried spearmint for a fresh, aromatic finish. Keeping the zucchini unpeeled also helps preserve its naturally vibrant green color while making the most of the whole vegetable.

Think of it as the homemade answer to those expensive green drinks we sometimes buy because they promise to make us feel healthier. No fancy powders, exotic ingredients, or complicated preparations here—just plenty of seasonal vegetables blended into a light, refreshing soup that is naturally rich in nutrients and easy to enjoy.

Served well chilled, it makes a particularly good summer appetizer: fresh enough to awaken your appetite without filling you up before the main course. And when your zucchini plant is producing more than you know what to do with, having another delicious way to enjoy the harvest is always welcome.

If you love refreshing soups like this one, there is a whole world of Spanish cold soups waiting to be explored. From the iconic Gazpacho and creamy Salmorejo to lighter and more creative summer versions, The Ultimate Guide to Spanish Cold Soups for Summer: Gazpacho, Salmorejo & More brings them all together in one place. Discover the recipes, learn what makes each one different, and find your new favorite way to stay cool with a refreshing bowl of Spanish summer soup.

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Ingredients

Metric Amount	Imperial Amount	Core Ingredient	Preparation
2 units (≈ 500 g)	2 units (≈ 1.1 lb)	Zucchini	Unpeeled, washed, cut into medium chunks
3 units (≈ 300 g)	3 units (≈ 10.5 oz)	Leeks	White part only, cleaned, halved, cut into thin half-moons
1 unit (125 g)	1 unit (4.4 oz)	Greek yogurt	Unsweetened, plain
½ tbsp (or 4–5 leaves)	½ tbsp (or 4–5 leaves)	Spearmint (Hierbabuena)	Dried or fresh
750 ml	3¼ cups	Water	Hot or room temperature
2 tbsp (30 ml)	2 tbsp (1 fl oz)	Extra virgin olive oil	For sautéing
1 pinch	1 pinch	Salt	Fine, to taste
1 pinch	1 pinch	Black pepper	Ground, to taste

Instructions

1. Gently sauté the leeks

Heat the extra virgin olive oil in a medium pot over low heat. Add the sliced leeks and cook gently for about 5 minutes, stirring occasionally. Do not let them brown—the goal is to soften them while keeping their delicate flavor and pale color.

Chilled Zucchini and Leek Soup leek cutted

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2. Add the zucchini and cook vegetables

Add the unpeeled zucchini, salt, and black pepper. Stir well and cook over medium-low heat for about 5 minutes, allowing the zucchini to soften slightly and absorb the flavors of the leeks and olive oil. Pour in the water and bring to a gentle boil. Cover the pot, reduce the heat to low, and simmer for about 15 minutes, or until the zucchini and leeks are completely tender. If you start with room-temperature water, begin counting the 15 minutes once the liquid reaches a gentle boil.

Chilled Zucchini and Leek Soup add zucchini

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3. Add the spearmint while hot

Turn off the heat and add the dried chopped spearmint to the hot vegetables and broth. Stir and let it infuse for a few minutes. The residual heat gently releases its aroma without overpowering the fresh vegetable flavor.

Chilled Zucchini and Leek Soup add herbs

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4. Blend until smooth

Use an immersion blender to blend everything directly in the pot until completely smooth. The soup should be fluid and light rather than thick like a cream soup. Taste and adjust the salt if needed.

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5. Add the yogurt

Allow the soup to cool until it is warm or close to room temperature. Add the Greek yogurt and blend or whisk until completely incorporated and smooth. Avoid adding the yogurt while the soup is very hot, as excessive heat can affect its texture.

Chilled Zucchini and Leek Soup add yogurt

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Chilled Zucchini and Leek Soup blend after yogurt

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6. Chill thoroughly & Serve

Transfer the soup to a covered container and refrigerate for at least 2 hours. It is best served thoroughly chilled. Stir well before serving and garnish with a few fresh spearmint leaves and, if desired, a little finely sliced crispy leek.

Chilled Zucchini and Leek Soup healty summer soup

Chef’s Notes for the Perfect Chilled Zucchini and Leek Soup

Can I make this chilled zucchini soup ahead of time? Absolutely. In fact, it is even better after a few hours in the refrigerator. The resting time allows the zucchini, leeks, yogurt, and spearmint to come together while the soup becomes thoroughly chilled. Keep it in a sealed container in the refrigerator and give it a good stir before serving.

Should I peel the zucchini before cooking? No, and that is intentional. The zucchini skin helps give the soup its naturally vibrant green color while also making the most of the whole vegetable. Just wash the zucchini thoroughly before cutting it.

How do I keep the soup light instead of turning it into a cream? Keep the recipe simple. There is no potato, cream, or other thickener in this soup. The Greek yogurt adds just enough body and a gentle tang while the vegetables and water keep the consistency light, fluid, and refreshing.

When should I add the dried spearmint? Add it after turning off the heat. The residual heat from the vegetables and broth is enough to release the aroma of the dried spearmint without cooking it for too long. This gives the soup a subtle herbal freshness rather than an overpowering mint flavor.

Can I use fresh spearmint instead? Yes, but use it gently. Fresh spearmint has a brighter and more pronounced aroma than dried spearmint. A few leaves can be infused in the hot soup, while a couple of fresh leaves make a simple and attractive garnish when serving.

Common Mistakes to Avoid When Making Chilled Zucchini and Leek Soup

Browning the leeks: This can change the entire character of the soup. The aim is to gently soften the leeks while keeping their delicate flavor and pale color. Cooking them over low heat rather than allowing them to caramelize helps maintain the fresh, clean character of this summer soup.

Peeling the zucchini: You are throwing away part of what makes this soup look so good. The green skin contributes to the beautiful color of the finished soup and contains valuable nutrients. Wash the zucchini well and use it whole.

Adding the yogurt while the soup is very hot: Give it time to cool first. Adding yogurt to a very hot vegetable mixture can affect its texture and fresh flavor. Let the blended soup cool to warm or room temperature before incorporating the yogurt for a smoother result.

Overcooking the zucchini: Tender is enough. Once the zucchini and leeks are completely soft, there is no benefit to continuing to cook them for much longer. Overcooking can dull the fresh vegetable flavor and reduce the vibrant green color you want in the finished soup.

Serving the soup before it is properly chilled: Cold is part of the recipe. This is designed as a refreshing summer appetizer, not a warm vegetable soup served at room temperature. Give it at least two hours in the refrigerator so every spoonful is properly cold and refreshing.

Chilled Zucchini and Leek Soup Ingredient Swaps & Variations

For a brighter finish: Add a little fresh lemon juice. A small squeeze of lemon just before chilling can sharpen the flavors and add another layer of freshness. Start with a small amount so the acidity complements rather than dominates the delicate zucchini and leek.

For a fresh herb variation: Use fresh spearmint instead of dried. Fresh spearmint gives the soup a brighter herbal character. Use only a few leaves at first, as its flavor can become quite pronounced when blended.

For a crunchy garnish: Finish with crispy leek. Thinly slice a small amount of leek and fry it until golden and crisp. Add it just before serving for a delicate contrast to the smooth, chilled soup.

For extra texture: Add toasted seeds. A small sprinkle of toasted pumpkin or sunflower seeds provides a pleasant crunch and makes the soup feel a little more substantial while keeping its light summer character.

For a different Mediterranean herb profile: Try a little fresh basil or parsley. These herbs can be used in small amounts alongside or instead of the spearmint. Keep the quantities modest so the fresh zucchini and leek remain the main flavors.

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