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Irish Colcannon (Mashed Potatoes with Cabbage)

Make Irish colcannon with fluffy mashed potatoes, tender cabbage, butter, milk, and scallions. A comforting six-serving side with make-ahead and reheating notes.

Prep time
15 min
Cook time
30 min
Total time
45 min
Servings
6
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VegetarianFamily FriendlyMake Ahead
Colcannon with dark leafy greens; a kale serving variation of this cabbage recipe.
Photo: VegaTeam · Source · CC BY 2.0. Colcannon with dark leafy greens; a kale serving variation of this cabbage recipe.

Colcannon brings mashed potatoes and cabbage together in a comforting Irish-style side dish. This home version folds buttery, gently cooked cabbage and scallions into warm russet potatoes, then loosens the mash with milk. It does not contain bacon or meat stock, though some family variations do. Cut the potatoes evenly, cook them until fully tender, and let excess steam escape before mashing. A hand masher keeps the texture light; a blender can turn cooked potato starch sticky. The recipe makes six generous side servings, useful alongside a vegetable main or a separately cooked roast. It is just as welcome at an everyday table as in a St. Patrick's Day menu.

Keep colcannon fluffy, not gluey

The mash depends on fully cooked potato pieces and gentle handling. Check the largest chunk with a knife before draining: a firm center will stay lumpy even if you beat the potatoes harder. Let steam escape briefly, then use a hand masher. A blender or vigorous food processor releases too much starch for this style of mash and can make it sticky. Warm milk loosens the potatoes without abruptly cooling them.

Cook the cabbage while the potatoes simmer, then let excess water evaporate before folding it in. The goal is tender ribbons distributed through the mash rather than a watery green layer at the bottom of the bowl. Scallions soften briefly with the cabbage; they do not need to brown. The licensed photograph shows a darker leafy-green variation, while the ingredient list here uses green cabbage. Kale is included in the substitutions with a reminder that it may take longer to soften.

Troubleshooting this recipe

How is colcannon different from plain mashed potatoes?

This version folds tender cabbage and scallions into mashed potatoes with milk and butter. Plain mash does not include that vegetable component. Irish household versions vary; bacon is not required by this recipe.

Can I make colcannon ahead for a holiday dinner?

Yes. Cool and refrigerate promptly in a shallow covered container, then follow the storage and reheating guidance. Loosen with warm milk or water when reheating; it thickens in the refrigerator. Do not hold it at room temperature while the rest of dinner cooks.

Which potato should I buy in a US grocery store?

Russets give a fluffy mash and are the specified choice. Yukon Gold potatoes are a useful alternative at the same weight, giving a denser, creamy texture. Avoid assuming small waxy salad potatoes will mash identically.

Further context: Potato and cabbage dish context: USDA Food and Nutrition Administration. The method above is our home-style adaptation.

Let’s make it

Irish Colcannon (Mashed Potatoes with Cabbage)

Serves 6 · Prep 15 min · Cook 30 min · Total 45 min

Ingredients

Step-by-step instructions

  1. Put the potato chunks in a large saucepan. Add cold water to cover by 1 inch (2.5 cm) and add the potato-water salt. Bring to a boil, then reduce to a steady simmer. Cook for 15 to 20 minutes after simmering begins, until a knife slides through the largest pieces without resistance.
  2. While the potatoes cook, melt 2 tablespoons (28 g) of the butter in a large skillet over medium-low heat. Add cabbage with 2 tablespoons (30 ml) water. Cover and cook for 8 to 10 minutes, stirring occasionally, until tender but not browned.
  3. Uncover the cabbage. Add scallions and cook for 2 minutes, stirring, until softened and excess water has evaporated. Remove from the heat. If the pan dries before the cabbage softens, add another tablespoon (15 ml) water rather than letting it burn.
  4. Warm 3/4 cup (180 ml) milk with the remaining butter in a small saucepan just until steaming, not boiling hard. Drain the tender potatoes well, return them to their empty pot, and leave over very low heat for 1 minute, shaking gently, to release excess moisture.
  5. Take the potato pot off the heat. Mash with a hand masher, then fold in the warm milk mixture, salt for the mash, and pepper. Add the cooked cabbage and scallions. Fold just until combined; do not beat or blend.
  6. If too stiff, add a little of the extra warm milk, up to 1/4 cup (60 ml), until spoonable. Taste and adjust seasoning. Serve six side portions while warm. A small well in the center is traditional-looking, but extra melted butter is optional and not needed for this recipe.

A few kitchen notes

  • Start potatoes in cold water so the pieces heat evenly. Under-cooked centers leave lumps that extra mixing will not fix.
  • Drain the cabbage well if liquid remains in the skillet; watery greens can dilute the mash.
  • The 30-minute cooking estimate assumes cabbage and milk preparation overlap with cooking the potatoes. Allow more time with a slow-heating stove.

Ingredient substitutions

  • Use Yukon Gold potatoes at the same weight for a denser, naturally creamy mash.
  • Finely chopped kale can replace cabbage by weight; remove tough stems and cook until tender, allowing a few extra minutes if needed.
  • For a dairy-free adaptation, use an unsweetened plant milk and dairy-free butter. Check product labels and expect a different flavor.

Storage & reheating

Refrigerate in a shallow container within 2 hours (1 hour above 90°F/32°C). Use within 3 days; reheat with milk or water to 165°F (74°C).

What to serve with it

Serve with our easy ratatouille for a vegetable-focused meal, or with a separately cooked roast. Main dishes are not included in the 45-minute total.

A conversation around the table

Comments & kitchen questions

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Questions from the kitchen

Can I make Irish Colcannon (Mashed Potatoes with Cabbage) ahead?

Refrigerate in a shallow container within 2 hours (1 hour above 90°F/32°C). Use within 3 days; reheat with milk or water to 165°F (74°C).

What if I can’t find an ingredient?

Use Yukon Gold potatoes at the same weight for a denser, naturally creamy mash. Finely chopped kale can replace cabbage by weight; remove tough stems and cook until tender, allowing a few extra minutes if needed. For a dairy-free adaptation, use an unsweetened plant milk and dairy-free butter. Check product labels and expect a different flavor.

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