Colcannon is a classic Irish dish of mashed potatoes folded with cabbage or kale, butter, and often scallions, with a well of melted butter in the center. It works because the creamy, starchy potatoes balance the earthy greens and the rich, salty butter, creating a comforting side that pairs with almost anything. While its exact origins are disputed, colcannon has been a staple of Irish home cooking for centuries, especially around Halloween, and it remains a beloved way to use humble ingredients.
Ingredients
- 2 lb (900 g) russet or Yukon Gold potatoes, peeled and quartered
- 1 lb (450 g) green cabbage or kale, cored and finely shredded (about 1 small head)
- 1 cup (240 ml) whole milk, plus more as needed
- 4 tbsp (56 g) unsalted butter, plus extra for serving
- 4 scallions, thinly sliced (white and green parts)
- 1 tsp (5 g) salt, plus more for the cooking water
- 1/2 tsp (1 g) black pepper, or to taste
- Optional: 1/4 tsp (1 g) ground nutmeg
Instructions
- Place the peeled and quartered potatoes in a large pot and cover with cold water by 1 inch (2.5 cm). Add a generous pinch of salt. Bring to a boil over high heat, then reduce to a simmer and cook for 15–20 minutes, until a knife pierces a potato piece with no resistance.
- While the potatoes cook, bring a separate large pot of salted water to a boil. Add the shredded cabbage or kale and cook for 5–7 minutes, until tender but still bright green. Drain well and set aside.
- In a small saucepan, warm the milk, 4 tablespoons (56 g) butter, and the sliced scallions over low heat until the butter melts. Keep warm.
- Drain the potatoes thoroughly and return them to the pot. Mash them with a potato masher or ricer until smooth.
- Pour the warm milk-butter mixture over the mashed potatoes and stir until incorporated. Add the drained cabbage or kale and mix well. Season with salt, pepper, and nutmeg if using. If the mixture is too stiff, add a splash more warm milk.
- Serve hot, with a generous pat of butter melting into a well in the center of each portion.
Tips
- Use the right potato: Russets give a fluffy, absorbent mash; Yukon Golds are creamier and hold together a bit more. Avoid waxy potatoes like red or new potatoes, which can turn gluey.
- Don’t skip the warm milk: Adding cold milk to hot potatoes can make the mash stiff and lumpy. Warm the milk and butter together before mixing.
- Drain the greens well: Excess water in the cabbage or kale will make the colcannon watery. Squeeze the cooked greens gently in a clean kitchen towel before adding.
- Make it ahead: Colcannon can be assembled a day ahead and refrigerated. Reheat gently on the stovetop with a little extra milk or butter to restore creaminess.
Serving Suggestions
Colcannon is traditionally served as a side with corned beef, roasted chicken, or grilled sausages. It also makes a hearty vegetarian main when topped with a fried egg or served alongside a simple green salad. For a festive touch, shape it into a mound and make a well in the center for extra melted butter.
Variations
- Kale colcannon: Use curly kale instead of cabbage for a slightly more robust, earthy flavor.
- Irish champ: Omit the cabbage or kale and increase the scallions to 1 cup (about 1 bunch) for a scallion-forward mash.
- Bacon colcannon: Fold in 6 slices of cooked, crumbled bacon for a smoky, salty twist.
- Vegan colcannon: Substitute olive oil or vegan butter for the butter and use unsweetened oat or soy milk instead of dairy milk.
Storage and Reheating
Refrigerate leftover colcannon in an airtight container within 2 hours of cooking; it will keep for 3–4 days. To reheat, place it in a saucepan over medium-low heat with a splash of milk or water, stirring frequently, until heated through. You can also microwave individual portions in 30-second bursts, stirring between each, until hot. Reheated leftovers should reach 165°F (74°C) before serving.
Frequently Asked Questions
Can I use frozen cabbage or kale? Yes, frozen greens work in a pinch. Thaw them completely and squeeze out as much moisture as possible before adding to the mash.
What if my colcannon is too thin? If the mash is too loose, cook it over low heat for a few minutes, stirring constantly, to evaporate excess liquid. Alternatively, add a little more mashed potato or let it sit uncovered for 5 minutes.
Can I make colcannon without dairy? Absolutely. Use olive oil or a plant-based butter and unsweetened non-dairy milk. The texture will be slightly less rich but still delicious.
Is colcannon the same as champ? No. Champ is mashed potatoes with scallions and milk, but no cabbage or kale. Colcannon is the version with greens.
Can I use red potatoes? Red potatoes are waxy and will result in a denser, less fluffy mash. If that’s all you have, they’ll work, but the texture will be different.
Why is colcannon associated with Halloween? In Irish tradition, colcannon was often served on Halloween night, with coins or rings hidden inside as a fortune-telling game. This custom is less common today but adds to the dish’s folklore.
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