Colcannon Mashed Potatoes with Kale is a delightful twist on traditional mashed potatoes that brings a bit of green to the table. This dish combines creamy, buttery potatoes with tender kale, sautéed onions, and a little bit of garlic for extra flavor. The result is a comforting, rustic side that feels both familiar and fresh.
I love making colcannon because it reminds me of cozy nights in, especially during cooler months. The kale adds a nice texture and earthiness that makes the potatoes feel special without being fancy. I like to sauté the kale just enough so it stays bright and slightly crisp, which keeps the dish light and vibrant. Plus, using kale means you get a little extra nutrition hidden inside something everyone loves.
My favorite way to serve colcannon mashed potatoes is alongside roasted chicken or grilled sausages—they soak up the buttery goodness perfectly. It’s also fun to serve it with a drizzle of melted butter on top and a sprinkle of fresh chives to brighten things up. Whenever I make this dish for friends or family, it always gets smiles and requests for seconds, which is the best kind of compliment in my book.
Key Ingredients & Substitutions for Colcannon
Potatoes: Yukon Gold is great for creamy texture, while Russets give a fluffier mash. Both work well, so use what you have. Avoid waxy potatoes like red potatoes—they don’t mash as smoothly.
Kale: Remove tough stems to avoid chewiness. You can substitute kale with collard greens, spinach, or Swiss chard for a different but still delicious green.
Butter and Milk: Butter adds richness, so don’t skip it. Whole milk or cream gives the mash a silky feel. For dairy-free, try olive oil and almond milk or another plant milk.
Green Onions: They add a mild onion flavor when sautéed. If you don’t have green onions, shallots or mild yellow onions are good options.
Nutmeg: Optional but adds warmth. A small pinch goes a long way, so use it sparingly.
How to Achieve Perfectly Creamy and Smooth Mashed Potatoes?
To get creamy mashed potatoes without lumps, start by boiling potatoes in cold, salted water. This helps them cook evenly and absorb some salt.
- Don’t overcook potatoes—just until very tender so they mash easily.
- Drain well to avoid excess water that makes mash runny.
- Warm your milk or cream before adding—it blends better without cooling the potatoes.
- Add butter early while mashing to help create a silky texture.
- Use a potato masher or ricer for smoothness; avoid over-mixing which can make potatoes gluey.

Equipment You’ll Need
- Large pot – I recommend a sturdy pot to boil potatoes easily and quickly.
- Strainer or colander – helps drain potatoes and kale thoroughly so they don’t water down the mash.
- Small saucepan – perfect for warming milk or cream without overdoing it.
- Skillet or frying pan – for sautéing green onions in butter to bring out their flavor.
- Potato masher or fork – makes mashing potatoes simple and gives you control over smooth or chunky texture.
Flavor Variations & Add-Ins
- Use cooked leeks or shallots instead of green onions for a sweeter, milder onion flavor.
- Stir in grated sharp cheddar or Parmesan cheese to make it richer and more cheesy.
- Add cooked crumbled bacon or smoked salmon for a protein boost and extra flavor.
- Combine with cooked carrots or parsnips for added sweetness and variety in texture.
Colcannon Mashed Potatoes with Kale
Ingredients You’ll Need:
Main Ingredients:
- 2 pounds Yukon Gold or Russet potatoes, peeled and cut into chunks
- 4 cups chopped kale, tough stems removed
- 4 tablespoons unsalted butter, divided
- 1/2 cup whole milk or heavy cream, warmed
- 1/2 cup chopped green onions (white and green parts)
- Salt, to taste
- Black pepper, freshly ground, to taste
- Optional: a pinch of freshly grated nutmeg
How Much Time Will You Need?
This recipe takes about 30-35 minutes total. It includes 15-20 minutes to boil the potatoes until tender, a few minutes to blanch and drain the kale, and time to sauté the onions and assemble everything. It’s a quick and comforting side dish ready in under 40 minutes.
Step-by-Step Instructions:
1. Prepare and Boil the Potatoes:
Put the peeled and cut potatoes into a large pot. Cover them with cold water and add a pinch of salt. Bring the water to a boil over high heat, then lower the heat to medium and let the potatoes simmer for about 15-20 minutes, or until they are very tender when poked with a fork.
2. Blanch the Kale:
While the potatoes cook, bring another pot of salted water to a boil. Add the chopped kale and blanch for 2-3 minutes until it’s bright green and tender. Drain the kale well, then squeeze out as much water as possible using a clean kitchen towel or paper towels. If the kale pieces are large, roughly chop them again.
3. Mash Potatoes and Mix:
Drain the cooked potatoes and return them to the pot. Mash them until mostly smooth. Stir in 2 tablespoons of butter and the warmed milk or cream, then mash more until creamy and smooth.
4. Sauté Green Onions:
In a skillet, melt the remaining 2 tablespoons of butter over medium heat. Add the chopped green onions and cook gently for 2-3 minutes until soft but not browned.
5. Combine and Season:
Add the sautéed onions and chopped kale to the mashed potatoes. Stir everything together well. Season with salt and freshly ground black pepper to taste. If you like, add a pinch of freshly grated nutmeg and mix it in gently.
6. Serve Warm:
Serve your colcannon warm with an extra pat of butter on top if you like. Enjoy this delicious, hearty Irish side dish!
Can I Use Frozen Kale Instead of Fresh?
Yes, frozen kale works fine! Just thaw it completely, squeeze out any excess water, and proceed as you would with fresh kale. This helps avoid watery mashed potatoes.
How Should I Store Leftovers?
Store any leftover colcannon in an airtight container in the fridge for up to 3 days. Reheat gently on the stove or in the microwave, stirring occasionally to heat evenly.
Can I Make This Recipe Dairy-Free?
Absolutely! Substitute butter with olive oil or dairy-free margarine, and use plant-based milk such as almond, oat, or soy milk instead of whole milk or cream.
Is There a Way to Make the Mash Extra Creamy?
For an ultra-creamy texture, try adding a little cream cheese or sour cream when mashing. Also, warming the milk or cream before adding helps it blend better with the potatoes.