Colcannon (Irish Mashed Potatoes with Cabbage)

Method

1. Boil the potatoes in generously salted water for 15–18 minutes until completely tender — a knife should slide through with no resistance. Drain well, then return to the hot pot over low heat for 1 minute, shaking occasionally. This drives off excess moisture and gives you a drier base that absorbs butter and milk without becoming gluey.

2. Mash the potatoes with warm milk and 2 tbsp butter until smooth and creamy. A potato masher gives you a rustic texture with some lumps; a ricer gives you perfectly smooth mash. Season generously with salt and pepper.

3. Sauté the shredded cabbage in the remaining 2 tbsp butter over medium-high heat for 4–5 minutes until wilted and slightly golden in spots. Add the scallion whites and cook 1 minute more. The butter browns slightly, adding a nutty flavor to the cabbage.

4. Fold the cabbage and scallions into the mashed potatoes using a large spoon or spatula. Don't overmix — you want visible streaks of green cabbage throughout the white potato. Season to taste.

5. Serve in a bowl with a well pressed into the center and a generous pat of butter melting into it. Scatter the scallion greens on top. The melted butter pool is traditional and non-negotiable.

Equipment

• Large pot Recommended: Lodge 6-Quart Enameled Cast Iron Dutch Oven
• Large skillet Recommended: Joyce Chen 14-Inch Carbon Steel Wok
• Potato masher or ricer Recommended: OXO Good Grips Stainless Steel Potato Masher

Chef Notes

• The most important thing: Drain the boiled potatoes well and return them to the hot pot for 1 minute over low heat. This evaporates excess moisture, giving you fluffy, dry mashed potatoes that absorb butter and milk properly. Wet potatoes make gluey, heavy mash.
• Warm the milk before adding it to the potatoes. Cold milk drops the temperature and makes the mash seize up. Warm milk incorporates smoothly.
• Sauté the cabbage until just wilted — 5 minutes. Overcooked cabbage turns sulfurous and mushy. You want it tender with a slight bite.
• Traditionally served with a well of melted butter in the center. The butter pools and you dip each forkful into it.
• Yukon Golds give the creamiest mash. Russets work but are drier and fluffier.

Common Substitutions

Ingredient	Substitution	Notes
Butter	Ghee or olive oil	Ghee for similar richness. Olive oil for dairy-free.
Whole milk	Oat milk or almond milk	Oat milk is creamiest. Almond is thinner — add 1 tsp oil.
Potatoes	Sweet potatoes or cauliflower	Sweet potatoes add sweetness. Cauliflower for low-carb.
Scallions	Chives or thinly sliced leek greens	Chives are milder. Leek greens are closest in flavor.

What You're Practicing

Making proper mashed potatoes — draining well, drying over heat, using warm milk, and not overworking — is a foundational skill. The same principles apply to gnocchi, potato croquettes, and duchess potatoes. Understanding how moisture and handling affect potato texture gives you control over any potato dish. Visit Techniques for more on potato cookery.

Folding a sautéed vegetable into a starch base is a technique that appears across cuisines — from Irish colcannon to Italian risotto with vegetables to Japanese takikomi gohan. The vegetable adds flavor, color, and texture to an otherwise plain starch.