Kale and White Bean Soup
To make kale and white bean soup, soften onion, carrot and celery in olive oil, add plenty of garlic, then pour in broth and two tins of white beans. Simmer 15 minutes, mashing some of the beans against the pot to thicken the broth, then stir in shredded kale and cook 5 minutes more until just tender. Finish with lemon juice and olive oil. It keeps four days in the fridge and freezes well.
This is the soup to know for the back half of a Canadian autumn. Kale shrugs off frost and keeps standing in the garden long after the tender crops have given up, and it pairs with beans and garlic the way it was designed to. Everything else comes from the cupboard.
It costs very little, takes about half an hour, and is genuinely better on day two.
Kale wants less cooking than you think
Kale has a reputation for needing long simmering, and it doesn’t deserve it. Five minutes in hot broth is plenty — the leaves wilt, soften, and keep their colour and a little bite.
Push it to twenty and you get olive-drab strands with a flat, slightly bitter taste. Add it near the end, treat it as the last ingredient rather than the base, and it stays a vegetable instead of becoming a texture.
The stems are a different matter. They never soften in the time the leaves take, so either strip them out or chop them fine and add them at the very start with the onion and carrot, where twenty-five minutes will do the job.
Mash the beans — this is the whole trick
A bean soup that hasn’t been thickened is a bowl of beans sitting in broth. A bean soup that has been thickened is something you want a second bowl of.
The fix costs nothing. Once the beans have simmered a while, press about a cup of them against the side of the pot with the back of a wooden spoon and stir the paste back through. The released starch turns thin broth velvety. An immersion blender pulsed once or twice into one side of the pot does the same thing faster.
Do this before the kale goes in, so you’re not shredding the leaves while you mash.
Build a deeper broth from scraps
The soup is good with just broth and aromatics, but a few cupboard oddments make it taste like it simmered far longer than it did:
- A parmesan rind dropped in with the broth. Save them in the freezer for exactly this. It adds a savoury depth that’s hard to place and easy to miss when absent.
- A bay leaf and dried thyme, added early so they have time to open up.
- Bacon, pancetta or a ham hock if you’re not keeping it vegetarian — rendered first, with the vegetables softened in the fat.
- The lemon at the end. Beans and greens both go flat without acid. Don’t skip it, and add it off the heat so it stays bright.
Make it yours
Swap the kale for chard, cavolo nero, or the last of the spinach. Use chickpeas instead of white beans. Add a diced potato with the broth for a heartier bowl, or a handful of small pasta in the last ten minutes to turn it into something closer to a minestrone.
It keeps four days in the fridge, thickening as it sits — loosen with a splash of broth when reheating. It freezes well too, though the kale softens further on thawing, so slightly undercook the greens if you’re making a batch for the freezer.
At a glance
Kale and White Bean Soup
Ingredients
Tap an ingredient to check it off
Instructions
- Warm the olive oil in a heavy pot over medium heat. Add the onion, carrot and celery with a pinch of salt and cook 8 minutes until soft but not coloured.
- Add the garlic, thyme and chili flakes and cook 1 minute more, until the garlic smells sweet rather than raw.
- Pour in the broth and add the beans, bay leaf, and the parmesan rind if using. Bring to a simmer.
- Simmer 15 minutes. Partway through, mash about a cup of the beans against the side of the pot to thicken the broth.
- Stir in the shredded kale and simmer 5 minutes more, until tender but still deep green.
- Remove the bay leaf and rind. Add the lemon juice, then taste and adjust salt and pepper.
- Serve in warm bowls with a hard drizzle of olive oil and, if you like, grated parmesan.
Frequently asked questions
Do I need to remove the kale stems?
Yes, for curly kale — the stems stay tough and stringy no matter how long they simmer. Strip the leaves by folding each one in half along the rib and pulling the leaf away, or just run a knife down either side. Lacinato (dinosaur) kale has softer ribs you can often leave in if you slice them thinly. Don't throw the stems out: chopped fine, they can go in with the onion and carrot at the start, where they have time to soften.
Can I use dried beans instead of tinned?
Absolutely, and the soup is better for it. Use about 200 g dried white beans, soaked overnight and simmered until tender before you start, and keep the cooking liquid — it's full of starch and makes the broth silkier than water or stock will. Tinned beans are what makes this a 30-minute weeknight soup, though, so there's no shame in them.
How do I make the broth thicker without cream?
Mash some of the beans. Press roughly a cup of them against the side of the pot with a wooden spoon, or pulse a ladleful with an immersion blender and stir it back in. The bean starch thickens the broth into something velvety with no cream, no flour and no extra step. This is the single biggest difference between a watery bean soup and a good one.