Zucchini Soup Recipe: Creamy Blended Soup Ready in 35 Minutes

By Aquarium Guides Editorial Team · Updated November 9, 2026

Last Updated: November 9, 2026

This zucchini soup is smooth, mild, and quick: roughly 35 minutes from chopping to the table. Sautéed onion and garlic, a diced potato for body, and broth are simmered with zucchini and blended until velvety. A splash of cream and a handful of basil finish it. The recipe makes about six cups, enough for four bowls, and it works hot or chilled.

Why a Potato?

Zucchini on its own makes a thin, watery purée because it has little starch. One medium potato adds body and creaminess, so the soup feels rich without needing a lot of cream. You can leave out the cream entirely and still get a smooth texture.

Ingredients

• 2 tablespoons olive oil or unsalted butter
• 1 medium yellow onion, chopped (about 1 cup)
• 3 cloves garlic, sliced
• 1 medium Yukon Gold potato (about 6 ounces / 170 g), peeled and cut into 3/4-inch cubes
• 2 pounds (900 g) zucchini (about 4 medium), trimmed and cut into 3/4-inch pieces
• 4 cups (960 ml) low-sodium chicken or vegetable broth
• 1 teaspoon kosher salt, plus more to taste
• 1/4 teaspoon black pepper
• 1/2 cup (120 ml) heavy cream or half-and-half, optional
• 1/2 cup lightly packed fresh basil leaves
• 1 tablespoon lemon juice
• Grated Parmesan, toasted pine nuts, or croutons, for serving

Instructions

1. Heat the oil in a large Dutch oven or soup pot over medium heat. Add the onion and a pinch of salt and cook, stirring occasionally, for 5 to 6 minutes until soft and translucent but not browned.
2. Add the garlic and cook for 1 minute until fragrant.
3. Add the potato and broth. Bring to a boil, then reduce to a simmer, cover, and cook 8 minutes.
4. Add the zucchini, salt, and pepper. Return to a simmer and cook, partly covered, for 10 to 12 minutes, until the potato and zucchini are very tender when pierced with a fork.
5. Remove the pot from heat and stir in the basil.
6. Purée with an immersion blender directly in the pot until smooth, about 1 to 2 minutes. If using a standing blender, work in two batches, filling it no more than halfway, and vent the lid with a towel over the top so steam can escape.
7. Return the soup to the pot if needed. Stir in the cream and lemon juice. Warm gently over low heat for 2 minutes without boiling.
8. Taste and adjust the salt and pepper. Ladle into bowls and top as desired.

Tips

• Do not overcook the zucchini. Cooking it too long dulls the color to olive. Cook only until tender, then blend.
• Add basil off the heat. Basil stirred in at the end keeps the flavor fresh and the soup greener.
• Blend longer than you think. A full minute or two creates a silky result, particularly with skin-on zucchini.
• Season at the end. Broth reduces and can concentrate in salt. Taste after blending before adding more.
• Add acid. Lemon juice brightens a mild soup. A teaspoon of white wine vinegar works too.
• Fix thickness easily. Too thick? Stir in broth, 1/4 cup at a time. Too thin? Simmer uncovered for 5 more minutes.

Flavor Variations

Serving Suggestions

A drizzle of olive oil and a few cracks of black pepper are enough, but toppings add texture. Try crisp croutons, crumbled bacon, a spoonful of pesto, a dollop of sour cream, or toasted pumpkin seeds. For a heartier meal, serve with grilled cheese sandwiches cut into strips for dipping, or a slice of crusty bread rubbed with garlic.

Serving It Cold

Chill the finished soup in the refrigerator for at least 3 hours. Cold dulls seasoning, so add extra salt and lemon juice before serving. Use buttermilk or yogurt in place of the cream for a tangier cold soup, and top with chopped cucumber and mint.

Storage and Reheating

Cool the soup to room temperature within two hours, then transfer to airtight containers. It keeps in the refrigerator for up to four days. Reheat in a saucepan over medium-low heat, stirring now and then, until steaming, about 6 to 8 minutes. In the microwave, heat in 60-second intervals, stirring between each. Do not let a cream-based soup boil, as high heat can cause separation.

For freezing, prepare the soup without cream and freeze in portions for up to three months. Thaw overnight in the refrigerator, reheat, and stir in the cream and lemon juice at the end. If the soup separates a little after thawing, a quick whirl with the immersion blender brings it back together.

FAQ

Do I need to peel the zucchini for soup?

No. The peel blends in and gives the soup a pale green color. If you want a very light, ivory-colored soup, peel the zucchini first.

Why is my zucchini soup watery?

Not enough starch or too much broth. Keep the potato in, and use 4 cups of broth for 2 pounds of vegetables. Simmer uncovered a few minutes to reduce if needed.

Can I make zucchini soup without a blender?

Yes. Mash with a potato masher for a rustic soup, or press through a food mill for a smooth one.

Can I use frozen zucchini?

Yes. Add frozen chunks directly to the simmering broth and cook 10 to 12 minutes until tender. The soup may be slightly thinner, so reduce the broth by 1/2 cup.

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