Few recipes are as easy, healthy, and comforting as a creamy zucchini and potato soup. It’s a weeknight staple.
However, we’ve all ended up with a sad, watery zucchini soup that separates and looks more like broth than a restaurant-style creamy soup.
With this guide, you’ll make an incredibly silky, thick, flavorful soup using just a regular pot and an immersion blender.
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The Secret to the Perfect Texture: Why your Soup needs a potato
Zucchini is almost 95% water. If you just cook it and mash it, the cell structure breaks down and the water separates, leaving a somewhat uneven texture. To fix this, we follow two golden rules.
- Starch as an emulsifier: adding a medium potato doesn’t just make the soup thicker. The potato starch acts as a natural binder, helping emulsify the liquid when the soup is blended at high speed.
- Sauté the vegetables first: never add the raw vegetables directly to the broth. Sautéing the zucchini, potato, and onion with a good splash of olive oil in the pot caramelizes the natural sugars (Maillard reaction). This not only deepens the flavor but also helps cook off excess moisture before the broth is added. This not only boosts the flavor, but also evaporates the excess moisture from the vegetables before cooking.
Storage tip: you can double the amounts in this recipe. It keeps wonderfully in the fridge for up to 4 days in an airtight container. That said, don’t freeze it: frozen potatoes change their structure and, when thawed, the soup may separate and develop a grainy texture.
Smart swaps
- Don’t want to use potato? You can replace it with an equivalent amount of cream cheese, ricotta, or a green apple (Granny Smith), peeled. The apple adds a slightly tart note and contains pectin, which also helps thicken the soup.
- For a Vibrant Green Color: if you want the soup to have a vibrant, bright green color, don’t peel the zucchinis. The skin contains most of the fiber and the color. If you prefer paler soup with a milder flavor, peel them completely.
The Recipe. Zucchini and Potato soup
- Preparation time: 10 minutes
- Cooking time: 20 minutes
- Serves: 4
- Essential equipment: A large pot and a powerful immersion blender.
Ingredients
- 2 medium zucchini (approx. 800 g, washed and chopped).
- 1 large potato or 2 medium ones (approx. 300 g, peeled and cut into chunks).
- 1 onion.
- 600 ml of vegetable broth (or water, although broth gives the soup a deeper flavor).
- 30 ml of extra virgin olive oil.
- Salt and freshly ground black pepper, to taste.
Step-by-Step Instructions
- Sauté the onion: heat the olive oil in a pot over medium heat. Add the chopped onion. Sauté it for about 4 minutes until the onion is soft and translucent, making sure it doesn’t brown too much.
- Sauté the vegetables: add the potato and zucchini in pieces to the pot. Sauté everything together for 5 minutes, stirring occasionally. This step is crucial to develop the flavor and cook off excess moisture.
- Cook the soup: pour in enough vegetable broth to just cover the vegetables. Season with salt and pepper. Bring to a boil, then reduce the heat to medium-low, cover, and simmer for about 20 minutes, or until the potato is completely tender.
- Blend: remove the pot from the heat and let it cool for a couple of minutes. Place the immersion blender at the bottom of the pot and blend on high until completely smooth and creamy, about 1–2 minutes.
Chef’s Notes: The Final Touch
Serve the soup hot or warm. For a restaurant-style finish, serve with croutons, a drizzle of extra virgin olive oil, roasted pumpkin seeds, or a little grated Parmesan.
Frequently Asked Questions about Zucchini and Potato soup
Why Does My Soup Turn Out Watery or Separate?
This usually happens for one of two reasons: too much broth was added, or the vegetables were not sautéed first. Zucchini releases plenty of water as it cooks, so the broth should only just cover the vegetables. Sautéing them first also helps cook off some of their excess moisture.
Can this soup be frozen?
Freezing is not recommended because potatoes can develop a grainy texture once thawed. The soup may also separate when reheated. Store it in an airtight container in the fridge for up to 4 days instead.
How Do I Keep the Soup Bright Green?
The key is to leave the zucchini unpeeled and avoid overcooking it. The skin provides most of the green color. As soon as the potato is tender, remove the pot from the heat; prolonged cooking breaks down the chlorophyll and can turn the soup dull brown or olive green.
If you’re looking for more vegetable recipes, don’t hesitate to check out our blog section ^^
Do you usually leave the skin on the zucchini to get that intense green color, or do you prefer to peel it for a milder taste? Tell me in the comments below how you make it!
zucchini and potato Soup
Description
A silky, creamy zucchini and potato soup made with simple ingredients and no dairy.
Ingredients
Method
-
Sofrito
Heat the olive oil in a pot over medium heat. Add the chopped onion and sauté for about 4 minutes, until soft and translucent but not browned.
-
Sauté the vegetables
Add the potato and zucchini chunks to the pot. Sauté for 5 minutes, stirring occasionally.
-
Add the broth
Pour in the vegetable broth, it should just cover the vegetables, add the salt, and the pepper. Turn the heat up until it boils, then lower it to medium-low, cover the pot, and let it cook for 20 minutes, or until the potato is completely tender.
-
Blend
Take the pot off the heat and let it cool for a couple of minutes. Place the immersion blender at the bottom of the pot and blend on high until completely smooth and creamy, about 1–2 minutes.
