Colcannon with Caramelized Onions

By , Test Kitchen Director · Reviewed by AislePrompt Editorial · ·

Creamy mashed potatoes blended with tender cabbage and golden caramelized onions, creating a comforting Irish side dish. This irish-inspired mediterranean ready in about 50 minutes pairs pounds potatoes, cabbage, tablespoons butter for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 250 calories and feeds 6, so it slots cleanly into a weekly meal plan and pairs well with a quick salad or grain on the side. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.

Prep: 20 min Cook: 30 min Serves 6 Irish cuisine 250 cal/serving
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Ingredients

Instructions

  1. Step 1: Place 2 pounds peeled and cubed potatoes in a pot, cover with cold water, and add 1/2 teaspoon salt. Bring to a boil over medium-high heat, then simmer for 15-20 minutes until fork-tender.
  2. Step 2: Melt 2 tablespoons butter in a skillet over medium heat. Add 1 large thinly sliced onion and cook for 10-12 minutes, stirring occasionally, until deep golden brown and caramelized.
  3. Step 3: Drain potatoes and return to pot. Add 1/2 cup chopped cabbage, 1/4 teaspoon black pepper, and caramelized onions. Mash until smooth, stirring in 1/4 cup heavy cream for extra creaminess.
  4. Step 4: Season with additional salt and pepper to taste. Serve warm, garnished with chopped chives.

Equipment for this recipe

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Frequently asked questions

How long does Colcannon with Caramelized Onions take to make?

Total time is about 50 minutes (20 min prep + 30 min cook). Most home cooks find this fits comfortably into a weeknight; double the batch on Sunday for two dinners.

How do I store leftover Colcannon with Caramelized Onions?

Cool to room temperature within 2 hours, then store in an airtight container in the fridge for up to 4 days. Reheat covered in a 350°F oven for 10-12 minutes, or microwave at 70% power in 60-second bursts to keep pounds potatoes from drying out.

Can I substitute ingredients in Colcannon with Caramelized Onions?

Yes — most ingredients in this recipe have flexible swaps. For oil, use any neutral high-smoke-point oil (avocado, grapeseed, refined coconut). For aromatics, dried herbs at ⅓ the volume of fresh work in a pinch. The full ingredient list is shoppable on Instacart so you can see substitutes in real time.

How do I scale Colcannon with Caramelized Onions for a different number of people?

The recipe is written for 6 servings. Multiply each ingredient by (your serving target / 6). Cook time stays roughly the same up to 2x; for 3-4x batches, switch from a skillet to a sheet pan or stockpot so the food isn't crowded — overcrowding steams instead of browns.

What goes well with Colcannon with Caramelized Onions?

Irish mediterranean like this pair well with a simple grain (rice, couscous, or crusty bread), a quick salad with acid (lemon vinaigrette, pickled onions), and a pan sauce or yogurt-based dip. Tap "Plan a meal with the AI" to get specific side suggestions.

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