Colcannon (Irish Mashed Potatoes with Cabbage and Butter)

Quick answer

Total time: 35 min
Level: Easy
Servings: 4 servings
Ingredients: 7

About this dish

Colcannon is a traditional Irish dish of hot mashed potatoes folded together with blanched shredded cabbage and chopped green onion, then brought to a creamy, pillowy consistency with warmed milk and butter.

Mashing the potatoes while they are still steaming hot is essential, because the starch granules release cleanly and evenly only at high temperature. Both the milk and butter must be heated before they go in, because cold dairy causes the starch to seize and turn the mash dense and gluey instead of light and smooth. Blanching the cabbage for three minutes in salted water leaves just enough resistance in each shred to contrast with the yielding potato. Green onion disperses a mild, fresh allium fragrance throughout the dish without overpowering it. A knob of butter placed on top just before serving melts into a shallow pool that deepens the richness of every spoonful. In Ireland, colcannon was traditionally eaten on Halloween, sometimes with a coin hidden inside the mash to bring good luck. Kale or spring onion can stand in for cabbage, and using a floury variety of potato produces the dish's characteristic light yet dense texture.

Ingredients

servings

IngredientAmountUnit

potatoes700 gg

cabbage220 gg

milk180 mlml

butter50 gg

green onion40 gg

salt1 tsptsp

black pepper½ tsptsp

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Instructions

Read the steps as a cooking flow: prep, heat, seasoning, doneness control, and finish.

6 steps

1

Control

Peel 700 g potatoes and cut them into even pieces so they cook at the same pace.

Cover with water, bring to a boil, then cook over medium heat until a skewer or fork slides in easily.
2

Season

Shred 220 g cabbage thinly and finely slice 40 g green onion.

Blanch the cabbage in boiling salted water for 3 minutes only, keeping a slight crunch instead of letting it turn limp.
3

Control

Put 180 ml milk and 50 g butter in a small pot.

Warm over low heat just until the butter melts and steam rises, avoiding a hard boil that can make the dairy taste heavy.
4

Step

Drain the potatoes and mash them immediately while they are still very hot.

Stop once the large lumps are gone, because working cooled potatoes too much can make the mash gluey.
5

Step

Fold the blanched cabbage and green onion through the hot mashed potatoes.

Use broad, gentle motions so the green vegetables spread evenly without compacting the potatoes into a dense paste.
6

Finish

Add the warm milk and butter mixture a little at a time, stirring until the mash loosens to a creamy texture.

Season with salt and black pepper and serve.

Practical Cooking Checks

The cues that matter most while cooking.

Key technique: Mashing hot potatoes immediately after boiling prevents gumminess before folding in blanched cabbage with warm butter.
Finish cue: Add the warm milk and butter mixture a little at a time, stirring until the mash loosens to a creamy texture.
Substitution: Both the milk and butter must be heated before they go in, because cold dairy causes the starch to seize and turn the mash dense and gluey instead of light and smooth.