A creamy Portuguese soup of mashed potato and thinly sliced green kale with olive oil, a light plant-based version
We cook Caldo Verde the way it is served in northern Portugal, a simple green soup built on mashed potato and green kale leaves sliced like threads.
Traditionally it is garnished with a slice of smoked sausage, and we serve the lighter version in which the vegetables, potatoes, and olive oil remain the stars. A warm, inexpensive soup that gathers the family around a single dish.
We peel the potatoes and cut them into small cubes, wash the green kale leaves and remove their thick ribs, then roll them up and slice them into very thin, thread-like strips.
In a pot we place the onion, garlic, potatoes, water, half the salt, and a spoonful of olive oil, and let them boil over medium heat for about twenty minutes until the potatoes are completely tender.
We blend the mixture with an immersion blender, or mash the potatoes with a fork, until the soup becomes thick and smooth like cream without any cream.
We bring the pot back to a boil, add the kale strips, the rest of the salt, and the pepper, and leave it for five minutes only, uncovered, until it softens and stays bright green, for long cooking drains its color.
We take the pot off the heat, add a drizzle of extra virgin olive oil on top, and serve the soup hot with rustic bread.
The glycemic index (GI) measures how quickly a food raises blood sugar, while the glycemic load (GL) measures how much a full serving raises it. Together they give the complete picture.
A low value (≤55) means a gradual rise in blood sugar — the most suitable range for diabetes and insulin resistance.
Glycemic load reflects the impact of the full serving. To lower it: take half a serving, or pair the recipe with a source of protein and fiber.
* Percent Daily Values are based on a 2,000-calorie diet per FDA food-label reference values — your daily needs may be higher or lower. Values are derived from the recipe's ingredients via the USDA database.
The most common problems when preparing Caldo Verde (Portuguese Kale and Potato Soup), and how to fix them:
We mash more of the potatoes or let it boil uncovered for a few minutes until it thickens, for the potato is what gives it body.
We add the kale in the last five minutes only and do not cover the pot, for long cooking drains its greenness.
We add more garlic and a drizzle of extra virgin olive oil on top at serving, and a little salt balances the sweetness of the potato.
We keep it in an airtight container for up to three days, and reheat it over low heat with a splash of water if it thickens too much.
We freeze it for up to a month, and it is best frozen before adding the kale, then we add it fresh when reheating so its color stays.
| Original Ingredient | Tested Substitute | Ratio | Flavor Difference |
|---|---|---|---|
| green kale | curly kale, chard, or spinach | same weight, 200 g | Any leafy greens will work, and collard greens are the closest to the Portuguese original |
| potato | cauliflower | same weight, 500 g | Cauliflower lowers the carbs and gives a similar creamy texture |
| water | low-salt vegetable broth | same volume, 1200 ml | It deepens the flavor, and we watch its salt so the soup stays low in sodium |
| the pure plant-based version | a few slices of smoked turkey for garnish | about 40 g on top | The original is garnished with Portuguese sausage (chourico), and we replace it with a smoked touch that is lighter in fat and salt, or leave it plant-based |
| Ingredient | Half quantity | Quantity (base) | Double |
|---|---|---|---|
| Potato | 250 g | 500 g | 1000 g |
| Green kale | 100 g | 200 g | 400 g |
| Onion | 60 g | 120 g | 240 g |
| Garlic | 6 g | 12 g | 24 g |
| Olive oil | 20 ml | 40 ml | 80 ml |
| Water | 600 ml | 1200 ml | 2400 ml |
The secret to the creamy texture is mashing the potatoes well, and the secret to the green color is adding the kale in the last five minutes only, without covering the pot.
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