If you’ve never tried Colcannon, you’re in for one heck of a treat. Creamy, buttery mashed potatoes are combined with sautéed cabbage and half-and-half for a wholesome take on traditional Irish comfort food—just as perfect for St. Patrick’s Day as it is for Sunday supper.
Planning a St. Patrick’s Day meal? If corned beef and cabbage is the only dish that comes to mind, let this colcannon round out the spread. They may seem humble at first glance, but these Irish mashed potatoes are rich, cozy, and packed with flavor—comfort food in its very best form.
The magic is in the mix-ins. Sautéed cabbage and onions add a naturally sweet, buttery, lightly peppery balance to the savory mashed potatoes, transforming them into something far greater than the sum of their parts. It’s the kind of “side dish” that could easily pass for dinner on its own—no main dish required.
Serve colcannon once for St. Patrick’s Day, and don’t be surprised if it earns a permanent place in your rotation. It’s just as welcome at Sunday supper, holiday feasts (Easter included), or anytime a serious mashed potato craving strikes. Go ahead and give it a try—you’ll be so glad you did.
For more comforting potato side dish recipes, try my Boursin Mashed Potatoes, High-Protein Cream of Potato Soup, and Dutch Oven Potatoes.
Jump to:
What Is Colcannon?
Also known as Irish mashed potatoes, colcannon is a traditional Irish dish made from mixing mashed potatoes with fried cabbage (or kale) and onions. It’s creamy, hearty, and next-level comforting — essentially mashed potatoes with greens stirred in.
Traditionally, Colcannon was served as a humble side dish enjoyed year-round. Recently, it has gained popularity around the world as a St. Patrick’s Day side. Within Ireland, it’s now also commonly enjoyed for Halloween.
What Does It Taste Like?
Each bite of colcannon starts with silky, light, and creamy potatoes, delivering instant comfort. From there, luscious butter and rich (but not too heavy) half-and-half follow, elevating the side dish to true comfort-food all-star status. Finally, sautéed cabbage and green onions come through, balancing the richness with gentle sweetness and a light peppery bite.
The lineup works beautifully together, creating a harmony of comforting textures and flavors that put this dish in a league of its own.
Why You Will Love Colcannon Potatoes
- Potatoes and Greens in One – Though I’m never against serving an extra veggie to round out the meal, these potatoes are a 2-for-1, saving you both time and effort.
- A Hit with Picky Eaters – Because the veggies blend right into the potatoes, even picky eaters tend to love them.
- Comfort Food at Its Finest – If you thought classic mashed potatoes couldn’t get any better, this Irish version will make you think again.
- Surprisingly Quick and Easy – Simple steps, big payoff—these potatoes are easy to make but taste like the kind of dish you’d save for a special occasion.
Ingredients
- Potatoes – Both Yukon Gold (golden) and russet potatoes work well here, so use what you prefer. Yukon golds give you a creamy, buttery mash, while russets are lighter, starchier, and extra fluffy.
- Cabbage – Savory or green cabbage adds a gentle, natural sweetness that beautifully balances the richness of the potatoes. You’ll need about ½ of a small green cabbage, stem removed and sliced.
- Green Onions – For a little peppery bite and freshness. Trim off the roots and slice 6 green onions into thin pieces.
- Unsalted Butter – This is where that classic mashed potato richness comes in. You’ll need 5 tablespoons—no need to bring it to room temperature unless you want to.
- Half-and-Half – Adds moisture, extra richness, and that cozy, creamy finish we’re after.
- Salt – Simple but essential. Salt pulls everything together and makes all the colcannon flavors really shine.
Substitutions
- Potatoes – Try a mix of russet and Yukon gold potatoes for the best of both worlds—creamy and fluffy. You can also swap in red potatoes for a heartier, denser mash that’s still creamy.
- Cabbage – For a deeper green (but still traditional) twist, sauté a bunch of kale—tough stems removed and finely chopped—in place of the cabbage. Sautéed leeks are also delicious here.
- Green Onions – For a milder peppery flavor with less bite, use chives instead, or swap in finely diced shallots for sweeter, softer onion notes.
- Butter – Substitute vegan butter for a plant-based variation, or use olive oil in a pinch. It’s less traditional and gives the dish a lighter finish, but it’s still delicious.
- Half-and-Half – Use whole milk for a lighter dish or cream for indulgent, restaurant-style colcannon. For a dairy-free option, unsweetened oat or coconut milk works well.
How to Make Colcannon (Irish Mashed Potatoes with Cabbage)
In just a few simple steps, this authentic colcannon will be all yours! Here’s how to prepare it:
Step 1: Boil the potatoes in a large pot of water for 15 minutes or until fork-tender.
Step 2: Drain the potatoes and place them in a large mixing bowl. Place 3 tablespoons of butter on top to melt and set aside.
Step 3: Sauté the cabbage in a skillet over medium heat in 2 tablespoons of butter for 5 minutes, or until bright green and partially softened. Add the sliced green onions and cook another 2-3 minutes. Remove from the heat and set aside.
Step 4: Add the half-and-half and salt to the potatoes and mash until smooth.
Step 5: Stir in the cabbage and green onions until well combined. And serve hot!
Recipe Tips
- Don’t rush. While this recipe isn’t time-intensive, allowing each step a few extra minutes when needed makes a big difference. Simmer the potatoes until fork-tender, and sauté the cabbage until tender and bright green.
- Season to taste. If you’ve ever had bland mashed potatoes, chances are it was due to seasoning. Salt is crucial to bringing the potatoes to life. Taste it before serving and stir in more as needed. For extra seasoning, you can also boil the potatoes in salted water, as you would pasta.
- Adjust the liquids as needed. If the potatoes seem dry, an extra splash of half-and-half will loosen them up. If the potatoes seem wet after draining, warm them in the empty pot over medium heat for 1-2 minutes, or start with 1/2 cup of half-and-half and add more as needed.
- Don’t overmash. Avoid thick or gluey mashed potatoes by not overworking them. Gently mash the potatoes just until you’ve reached your preferred texture, keeping them light and fluffy.
- Rice if desired. Run the steamed potatoes through a ricer for next-level, creamy, light colcannon. Chop the cabbage finely for this variation for a seamless mixture.
Serving Suggestions
Colcannon potatoes are an essential side dish for St. Patrick’s Day celebrations and pair beautifully with everything from corned beef to pork chops. Rich, comforting, and hearty, this classic Irish mash works just as well for special occasions as it does for cozy weeknight dinners. Beyond the holidays, it’s delicious alongside Pot Roast, Beef Stew, roasted chicken, or even grilled sausages.
Recipe Variations
This Irish colcannon recipe is versatile and easy to adapt to flavor preferences or what you have on hand. Here are a few variations to try:
- Russets and Yukon Gold Potatoes — Using equal parts of each gives you the best of both worlds, resulting in potatoes that are both light and creamy.
- Colcannon with Bacon — Stir ½ cup of crumbled bacon into the cabbage mixture for a smoky, extra-comforting twist.
- Extra Creamy — Swap the half-and-half for heavy cream for rich, buttery potatoes that rival your favorite steakhouse mash.
- Colcannon with Kale — Sauté a bunch of kale (tough stems removed and finely chopped) in place of the cabbage for a traditional alternative with festive St. Patrick’s Day hues.
- Leeks — Another classic Irish variation. Sauté and stir in two chopped leeks for a mellow, buttery flavor and irresistibly tender texture.
- Vegan and Dairy-Free — Use vegan butter in place of unsalted butter and swap unsweetened oat or coconut milk for the half-and-half for a plant-based version that’s still savory and creamy.
Storage Directions
- Refrigerating — Leftovers keep well in an airtight container in the fridge for up to 5 days.
- Freezing — Once cooled to room temperature, transfer the colcannon to a freezer-safe container and freeze for up to 3 months.
- Reheating — Warm the potatoes gently in the microwave or in a saucepan over low heat, adding a splash of milk as needed to loosen and rehydrate the mash.
Nutritional Info
Each serving of this colcannon recipe delivers about 277 calories, 37 grams of carbohydrates, 6 grams of protein, 13 grams of fat, and 5 grams of fiber—placing it squarely in the better-for-you comfort food side dish category.
While 277 calories is slightly higher than many classic mashed potato recipes (which typically fall in the 150–200 calorie range per serving), this version is also richer in fiber, provides a modest amount of protein, and isn’t excessively calorie-dense compared to many traditional holiday sides.
If you’d like to lighten the recipe to better fit your goals or dietary needs, there are several easy ways to do so. Start with less salt—beginning with ¼ teaspoon and adding more to taste—or simmer the potatoes in low-sodium chicken broth to boost savory flavor without excess sodium. To increase fiber and reduce carbohydrates, sauté extra cabbage to shift the ratio toward vegetables. You can also cut back on fat by swapping whole milk for half-and-half.
However you prepare it, these Irish mashers are guaranteed to be comforting, delicious, and festive—a wonderful addition to your holiday table from both a flavor and nutrition standpoint.
Total nutritional content per serving is:
- Calories: 277 calories
- Carbohydrates: 37 grams
- Protein: 6 grams
- Total Fat: 13 grams
- Sodium: 333 mg
- Fiber: 5 grams
*This nutritional information is an estimate and calculated based on the ingredients used to create the recipe. The nutritional value of your ingredients may differ slightly. Furthermore, this food is not intended to prevent, diagnose, cure, or treat any disease.
Pricing Info
This is what I personally paid to make this recipe:
- 2 lbs potatoes: $1.96
- ½ small head of cabbage: $0.99
- 6 green onions: $0.44
- 5 tbsp unsalted butter: $0.68
- ⅔ cup half & half: $0.45
- ¾ tsp salt: $0.01
The total comes out to be around $4.53 or roughly $0.76 per serving!
FAQs
Traditional colcannon is most often made with cabbage, though curly kale is a well-established variation—especially in parts of Ireland where it’s historically associated with Halloween. Today, both versions are common and frequently served around St. Patrick’s Day.
Certainly—for optimal flavor and texture, make colcannon up to 2 days ahead of time and store covered in the refrigerator before serving.
The best way to reheat colcannon is to add a splash of half-and-half, milk, or cream to restore its buttery, creamy texture. Reheat gently in the microwave or on the stovetop over low heat, stirring occasionally.
The most common reason Irish mashed potatoes turn gluey or dense is over-mashing. Mash the potatoes just until they reach your desired consistency. For extra-smooth potatoes, use a potato ricer instead of overworking them.
Other Holiday Recipes
Tried this recipe? Please leave a ⭐⭐⭐⭐⭐ rating in the comments below! I would really appreciate your feedback!
Recipe
Colcannon (Irish Mashed Potatoes with Cabbage)
Ingredients
- 2 lbs potatoes russets or yellow, peeled and diced
- ½ small head of cabbage savvoy or green, sliced
- 6 green onions diced
- 5 tbsp unsalted butter divided
- ⅔ cup half & half
- ¾ tsp salt
Instructions
- Bring a large pot of water to a boil, and add the peeled and diced potatoes. Simmer until fork-tender, about 15 minutes. Drain, transfer to a large bowl, place 3 tbsp butter on top of the potatoes to melt, and set aside.
- Meanwhile, heat 2 tbsp butter in a large skillet over medium heat, then add your sliced cabbage. Saute until tender, about 5 minutes, stirring occasionally. Add the green onions to the cabbage, and saute another 2-3 minutes. Set aside.
- Once the butter is melted over the potatoes, add the half & half and salt, and mash the potatoes until smooth. Stir in the cabbage and green onions until well mixed, then serve!
Nutrition
If you end up making this and loving it, take a photo and tag me on Instagram! I’d love to see your versions of my recipes! And feel free to rate it down below in the comment section. I would really appreciate it!
xoxo Megan
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