Colcannon soup is a creamy, comforting Irish-inspired dish that transforms the classic mashed potato and cabbage combo into a silky, spoonable meal. This healthy version uses low-fat milk and a modest amount of butter, keeping it rich in flavor but lighter than the traditional. It’s a one-pot wonder that’s perfect for chilly evenings, using simple pantry staples for a nourishing bowl of goodness.
Ingredients
- 1 tablespoon (14 g) unsalted butter
- 1 large yellow onion, diced (about 1 ½ cups / 200 g)
- 2 cloves garlic, minced
- 4 cups (960 ml) low-sodium vegetable broth
- 2 lbs (900 g) Yukon Gold potatoes, peeled and cut into 1-inch chunks
- 4 cups (about 12 oz / 340 g) green cabbage, finely shredded
- 1 cup (240 ml) low-fat milk (1% or 2%)
- 1 teaspoon salt, plus more to taste
- ½ teaspoon black pepper
- 2 scallions, thinly sliced (for garnish)
Instructions
- Melt the butter in a large pot or Dutch oven over medium heat. Add the onion and cook, stirring occasionally, until softened and translucent, about 5 minutes.
- Add the garlic and cook for 1 minute until fragrant.
- Pour in the vegetable broth and add the potatoes. Bring to a boil, then reduce heat to medium-low, cover, and simmer for 10 minutes.
- Stir in the shredded cabbage. Cover and continue to simmer until the potatoes are fork-tender and the cabbage is soft, about 10–12 minutes more.
- Remove the pot from the heat. Using an immersion blender, puree the soup until smooth. (Alternatively, let it cool slightly and blend in batches in a regular blender, filling it no more than halfway and venting the lid.)
- Stir in the milk, salt, and pepper. Return the pot to medium-low heat and warm the soup gently, stirring often, until heated through—about 3–5 minutes. Do not let it boil.
- Taste and adjust seasoning with more salt and pepper if needed. Ladle into bowls and garnish with sliced scallions before serving.
Tips
- Potato choice: Yukon Golds are ideal because they are naturally creamy. Waxy red potatoes will also work, but avoid russets—they can make the soup gluey when pureed.
- Blending safely: If using a countertop blender, never fill it more than halfway with hot liquid. Remove the center cap from the lid and cover with a towel to let steam escape, and blend on low to avoid splatters.
- Make it vegan: Swap the butter for olive oil and use unsweetened almond or oat milk instead of dairy milk. The flavor will be slightly nuttier but still delicious.
- Don’t skip the simmer: The potatoes need the full simmering time to become tender enough to puree smoothly. If they are still hard, cook a few minutes longer before blending.
Serving Suggestions
Serve this colcannon soup as a hearty lunch or light dinner with crusty whole-grain bread or a side salad. For a more filling meal, top each bowl with a poached egg or a spoonful of Greek yogurt for extra protein. It also pairs well with grilled cheese sandwiches for a comforting combo.
Variations
- Add bacon: Cook 2 slices of chopped bacon until crispy, then use the rendered fat instead of butter and sprinkle the bacon on top. This adds a smoky, savory depth.
- Use kale: Replace the cabbage with 4 cups (about 4 oz / 115 g) of chopped kale. Add it in the last 5 minutes of cooking to keep its vibrant color and texture.
- Make it chunky: Instead of pureeing the whole soup, puree only half and leave the rest chunky for a more rustic texture.
- Add herbs: Stir in 1 teaspoon of fresh thyme leaves or ½ teaspoon of caraway seeds along with the garlic for an extra layer of flavor.
Storage and Reheating
Store leftover soup in an airtight container in the refrigerator for up to 4 days. Reheat gently on the stovetop over medium-low heat, stirring often, until hot—about 5–7 minutes. You can also microwave individual portions in 1-minute intervals, stirring between each, until steaming. If the soup thickens after chilling, add a splash of milk or broth to loosen it to your desired consistency. This soup freezes well for up to 3 months; thaw overnight in the fridge before reheating.
Frequently Asked Questions
Can I use frozen cabbage? Yes, frozen shredded cabbage works well. Add it directly to the pot without thawing; it will cook slightly faster, so check for tenderness after 8 minutes.
Can I make this soup in a slow cooker? Absolutely. Sauté the onion and garlic first, then transfer to a slow cooker with the broth, potatoes, and cabbage. Cook on low for 6–7 hours or high for 3–4 hours until potatoes are tender. Puree and stir in the milk before serving.
How can I thicken the soup without cream? The potatoes naturally thicken the soup once pureed. If you want it even thicker, mash a few potato chunks with a fork before blending, or stir in a slurry of 1 tablespoon cornstarch mixed with 2 tablespoons cold water and simmer for 2 minutes.
Is this soup gluten-free? Yes, as written, this recipe is naturally gluten-free. Just be sure to use a gluten-free vegetable broth and check your butter and milk labels if you have celiac disease.
Can I use chicken broth instead of vegetable? Yes, chicken broth will add a richer flavor. Use low-sodium to control the salt level.
Why does my soup taste bland? Potatoes need a good amount of salt to bring out their flavor. Add salt gradually, but don’t be afraid to season generously at the end—also try adding a pinch of nutmeg or a splash of white wine vinegar to brighten it.
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