Jamie Oliver Colcannon Recipe: Irish Mashed Potato and Kale Delight

There’s something deeply comforting about a well-made colcannon that transforms humble ingredients into a restaurant-quality side dish.

This Irish classic combines creamy mashed potatoes with tender kale and spring onions, creating a dish that’s both hearty and full of flavor. The secret lies in the perfect balance of textures and the richness of the butter and cream.

What you get is a bowl of fluffy, buttery potatoes studded with vibrant greens—a celebration of simplicity done right. It’s the kind of dish that feels like a warm hug on a chilly evening.

Serve it alongside roasted meats or as a satisfying vegetarian main. Here’s how to make it.

Ingredients for Colcannon Recipe Jamie Oliver

Transform humble potatoes, kale, and spring onions into this creamy, vibrant dish.

The potatoes are the foundation—russets give that perfect fluffy texture. Yukon Golds work too but are slightly waxier. For kale, Lacinato (dinosaur kale) is ideal for its tenderness, but curly kale works in a pinch. Source your dairy from Whole Foods or local farms for the freshest heavy cream and butter. The spring onions should be bright green and firm, not wilted.

No kale? Cabbage or Swiss chard make excellent substitutes—just chop them finely. Dairy-sensitive? Use half-and-half instead of cream, though the texture won’t be as luxurious. For a richer flavor, swap one-quarter of the milk for buttermilk. The garlic can be omitted if you prefer a milder taste, but it adds a subtle depth worth keeping.

Leftover colcannon reheats beautifully—store in an airtight container for up to 5 days. Freeze portions for 3 months (thaw overnight before reheating). The dish thickens as it cools, so stir in a splash of warm milk when reheating to restore creaminess.

Step-by-Step Instructions for Irish Mashed Potato and Kale Delight

Here’s the method. Straightforward, tested, works every time.

Step 1: Boil and Mash the Russet Potatoes

Place the 2 lb Russet Potatoes (peeled and cubed) in a large pot and cover with cold water by 2 inches. Add 1 tsp of the Salt and bring to a rolling boil over high heat.

Reduce to medium heat and cook for 15-20 minutes until the potatoes are fork-tender. Drain thoroughly, then return to the pot. Add 0.5 cup Whole Milk (warm) and 0.5 cup Unsalted Butter (room temperature), reserving 2 tbsp of the butter for later.

Mash until smooth and creamy, ensuring no lumps remain. Season with the remaining 0.5 tsp Salt and 0.5 tsp Freshly Ground Black Pepper (coarse grind). Cover and set aside to keep warm.

Step 2: Sauté the Kale and Spring Onions

While the potatoes cook, heat the 1 tbsp Extra-Virgin Olive Oil in a large skillet over medium heat. Add the 6 whole Spring Onions (thinly sliced) and sauté for 3 minutes until softened.

Add the 2 cloves Garlic Cloves (minced) and cook for 30 seconds until fragrant. Stir in the 1 bunch Kale (stems removed, chopped finely) and cook for 5-7 minutes, stirring occasionally, until the kale wilts and turns bright green.

Reduce heat to low and stir in the remaining 2 tbsp Unsalted Butter. Cook for an additional 2 minutes until the kale is tender and the flavors meld. Remove from heat.

Step 3: Incorporate Heavy Cream and Combine

Pour the 0.75 cup Heavy Cream into the skillet with the kale mixture. Stir gently to combine, ensuring the cream coats the greens evenly. Let it sit for 1-2 minutes to allow the flavors to meld.

Add the warm mashed potatoes to the skillet or, for easier mixing, transfer the kale mixture to the pot of potatoes. Fold everything together gently with a wooden spoon or spatula until the kale and spring onions are evenly distributed throughout the mashed potatoes.

Taste and adjust seasoning if needed, though the initial salt should suffice. The texture should be creamy with visible flecks of vibrant green kale.

Step 4: Rest and Serve

Transfer the colcannon to a serving bowl and let it rest for 5 minutes to allow the flavors to deepen. The top should develop a slight crust, while the inside remains warm and creamy.

Serve immediately, garnished with an extra drizzle of Extra-Virgin Olive Oil or a pat of the reserved Unsalted Butter if desired. Each serving should showcase the smooth, buttery potatoes interspersed with tender kale and the mild oniony bite of the spring onions.

Common Mistakes When Making Perfect Results

Overworking the Potatoes

Mashing potatoes too vigorously turns them gluey from released starch. I use a potato ricer or hand masher with gentle pressure to keep them fluffy. Stop as soon as lumps disappear.

Waterlogged Potatoes

Drain potatoes thoroughly after boiling—any excess water makes your colcannon soupy. Return them to the pot and let sit for 1-2 minutes over low heat to evaporate residual moisture. 💡

Undercooked Kale

Raw kale stays fibrous and bitter. Sauté it for 5-7 minutes until bright green and tender. Add the garlic later to prevent burning—just 30 seconds for fragrance.

Skipping the Cream

Heavy cream adds richness that milk alone can’t match. Use the full 0.75 cup for that luxurious texture. Half-and-half works in a pinch but expect a lighter result.

Cold Ingredients

Warm milk and room-temperature butter incorporate smoothly into potatoes. Cold dairy causes clumping. I microwave milk for 30-45 seconds if I’m in a hurry.

Uneven Salting

Season potatoes in stages: 1 tsp in boiling water, 0.5 tsp after mashing. Taste before final adjustments—kale needs salt too. 🌟

Frequently Asked Questions