Irish Cabbage Soup: A Simple Potato Soup for a Cozy Supper

Irish cabbage soup is a home-style pot of green cabbage, potatoes, and vegetables simmered in broth until tender. Versions vary from family to family; this meat-free one uses leek, thyme, and a little cream for a satisfying soup that works as a simple supper or a warming first course.

Ingredients

2 tablespoons unsalted butter (28 g)
1 tablespoon olive oil (15 ml)
1 medium yellow onion, finely chopped (about 150 g)
1 medium leek, white and light-green parts only, thinly sliced and well rinsed (about 150 g)
1 medium carrot, peeled and diced (about 100 g)
2 garlic cloves, minced (about 6 g)
1 teaspoon dried thyme (about 1 g)
1 1/2 pounds Yukon Gold or other waxy potatoes, peeled if desired and cut into 1/2-inch cubes (680 g)
1 pound green cabbage, cored and thinly sliced (450 g)
7 cups low-sodium vegetable broth (1.65 L)
1 bay leaf
1 teaspoon fine salt (about 6 g), plus more to taste
1/2 teaspoon freshly ground black pepper (about 1 g)
1/2 cup heavy cream (120 ml), optional
2 tablespoons chopped fresh parsley (about 8 g)
1 teaspoon apple cider vinegar (5 ml), optional, for finishing

Instructions

Prepare the vegetables. Dice the onion and carrot, slice the leek, mince the garlic, and cut the potatoes into evenly sized cubes. Remove the cabbage’s tough outer leaves, cut out the core, and slice the leaves into ribbons about 1/4 inch (6 mm) wide. Rinse sliced leek thoroughly, separating the layers so grit does not end up in the soup. This prep takes about 20 minutes; keep the cut potatoes in a bowl of cold water if you need a little extra time, then drain them before cooking.
Soften the aromatics. Set a large, heavy pot or Dutch oven over medium heat. Add the butter and olive oil. When the butter has melted, stir in the onion, leek, and carrot. Cook for 7 minutes, stirring occasionally, until the onion looks translucent and the leek has softened without browning. Add the garlic and thyme and cook for 1 minute, stirring so the garlic becomes fragrant but does not scorch. Gentle cooking at this stage gives the broth a rounded, savory base.
Simmer the potatoes. Add the potatoes, vegetable broth, bay leaf, salt, and black pepper. Raise the heat and bring the liquid to a boil, which should take about 3 minutes. Reduce the heat to maintain a steady simmer and cook for 15 minutes, partly covered. The potatoes should be nearly tender when pierced with a knife but still hold their shape. If the pot boils vigorously, lower the heat; hard boiling can break up the potatoes and make the broth cloudy and starchy.
Cook the cabbage. Stir in the sliced cabbage, pressing it gently into the broth. Cover the pot and simmer for 12 minutes, stirring once or twice so the cabbage cooks evenly. It should be soft enough to bite comfortably while retaining a little texture, and the potatoes should be tender. If you prefer very soft cabbage, simmer for a few minutes longer, checking frequently; avoid cooking until the leaves turn limp and lose their fresh flavor.
Finish and season. Remove the bay leaf. Stir in the cream, if using, and parsley, then warm the soup for 2 minutes without letting it boil. Taste and adjust the salt and pepper. Add the cider vinegar a little at a time if the soup tastes flat; it should brighten the broth rather than make it noticeably sour. For a thicker texture, mash a few potato pieces against the side of the pot and stir them back in. Ladle into warm bowls and serve.

Tips

Clean the leek carefully. Soil often gets trapped between its layers. Slice it first, put the pieces in a bowl of cold water, swish them around, then lift them out so the grit stays at the bottom. Drain well before adding them to the pot.
Choose potatoes that hold their shape. Yukon Golds are creamy but remain fairly intact; red potatoes are another good option. Russets can be used, but they break down more readily and produce a thicker, less distinct broth. Cut the potatoes evenly so they finish cooking at the same time.
Adjust salt for your broth. The recipe starts with low-sodium broth so you can control the seasoning. If your broth is already salted, begin with half the listed salt and taste again near the end. Seasoning after the vegetables soften gives you a better sense of the finished broth.
Make the texture your own. Keep the soup chunky for a clear, brothy bowl, or mash some potatoes for a fuller body. Avoid blending all of it unless you specifically want a smooth soup: cabbage can become stringy when puréed, and the potatoes may turn gluey if processed too long.

Serving Suggestions

Serve the soup hot in deep bowls with brown bread, Irish soda bread, or another sturdy loaf for dipping. A slice of buttered bread makes the meal more substantial, while a crisp green salad or lightly dressed apple-and-celery salad adds a fresh contrast. For a simple garnish, use extra parsley and a few grinds of black pepper. A small spoonful of cream can be swirled over each bowl, but the soup is satisfying without it.

If you are serving it as a first course, offer smaller portions before a main dish such as roasted vegetables, baked fish, or a savory tart. For supper, put bread and butter on the table and let everyone add vinegar or black pepper to taste. The recipe makes six moderate bowls; larger portions are easy to serve, though the pot may then provide four hearty meals rather than six lighter ones.

Variations

Make it dairy-free: Replace the butter with another tablespoon of olive oil and leave out the cream. The soup will taste a little less rich, but the potatoes and slow-softened vegetables still give the broth plenty of body. You can also stir in a small splash of unsweetened oat cream at the end, choosing one that is not sweetened or flavored.

Add white beans: Stir in one drained 15-ounce can (425 g) of cannellini beans with the cabbage. They add a soft, creamy texture and make the soup more filling. Since canned beans are already cooked, they only need to heat through; keep the cabbage’s simmer time the same and taste before adding extra salt.

Use a different broth: Chicken broth gives the soup a savory, non-vegetarian base, while vegetable broth keeps it meat-free. If you have homemade broth, use it in the same quantity and adjust salt at the end. Avoid strongly flavored stocks that could overpower the mild cabbage and leek.

Make it heartier with bacon: For a non-vegetarian variation, cook 4 ounces (115 g) of diced bacon in the pot until crisp, remove it, and soften the onion, leek, and carrot in the rendered fat, adding a little oil only if needed. Sprinkle the bacon over the bowls rather than leaving it in for the full simmer, so it keeps some crispness. This changes the soup’s flavor substantially and may mean you need less salt.

Storage and Reheating

Let the soup cool briefly, then refrigerate it in a shallow, covered container within 2 hours of cooking. It keeps for 3 to 4 days in the refrigerator. The potatoes will absorb some broth as the soup sits, so the leftovers may be thicker than the freshly cooked soup. Add a splash of broth or water when reheating if you prefer a looser consistency.

Reheat only the portion you plan to serve, either in a saucepan over medium-low heat or in the microwave, stirring occasionally until steaming throughout and at least 165°F (74°C). Avoid a hard boil, especially if the soup contains cream, because vigorous boiling can affect its texture. If you plan to freeze some, freeze it before adding the cream for the best texture. Store in a freezer-safe container for up to 2 to 3 months, leaving room for expansion; thaw overnight in the refrigerator and reheat thoroughly. Potatoes can become a little softer after freezing, but the soup remains usable.

Frequently Asked Questions

Is Irish cabbage soup traditionally vegetarian?

There is no single fixed version. Some home-style recipes use only vegetables and broth, while others include bacon, ham, or another meat. This recipe is vegetarian when made with vegetable broth and without the optional meat variation; it is not presented as the only traditional way to make the dish.

Can I make the soup ahead?

Yes. The flavor settles as it rests, so it is convenient to cook a day ahead and refrigerate it promptly. For the best texture, leave out the cream until you reheat the soup, then stir it in and warm gently. If the potatoes have absorbed broth overnight, loosen the soup with a little stock or water before serving.

Can I use red or savoy cabbage instead of green cabbage?

Yes, though each changes the result slightly. Red cabbage can tint the broth purple and has a more assertive flavor. Savoy cabbage is tender and crinkled, so it may cook a little faster; begin checking it after about 8 minutes. Keep the amount close to 1 pound (450 g) and add extra cooking time only if needed.

Do I need to peel the potatoes?

No. Thin-skinned Yukon Gold or red potatoes can be scrubbed and left unpeeled, which saves prep time and gives the soup a more rustic look. Peel them if the skins are thick, damaged, or simply not to your preference. Whichever you choose, cut the potatoes into similar-sized pieces so they cook evenly.

How can I make the soup thicker without cream?

Mash a few cooked potato cubes against the side of the pot and stir them into the broth. You can also remove about 1 cup (240 ml) of soup, blend it carefully, and return it to the pot, taking care not to purée all the cabbage. A longer simmer will reduce the liquid, but keep the heat low and stir often so the vegetables do not stick.

What should I do if the soup tastes bland?

First check the salt, adding a small pinch and tasting again. Then try a little black pepper or the optional cider vinegar, which can lift the flavors without making the soup taste strongly acidic. If the broth is simply too diluted, simmer the uncovered pot for a few minutes to concentrate it, watching that the potatoes and cabbage do not overcook.

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