Creamy Potato and Cabbage Casserole – Classic Colcannon Mash
Enjoy the ultimate comfort food with this Potato and Cabbage Casserole, inspired by traditional Irish Colcannon. Creamy, buttery, and naturally flavorful, this recipe combines mashed potatoes, green cabbage, and melted butter for a dish perfect as a side or hearty main. Easy to make, baked to golden perfection, and packed with nutrients.
Ingredients
- 3 pounds russet or Yukon Gold potatoes, peeled and cut into chunks (perfect for fluffy mashed potatoes)
- 4 cups finely shredded green cabbage (about 1 small head or half a large one – rich in vitamin C and fiber)
- 1 cup whole milk (plus a splash more if needed – keeps mash creamy and smooth)
- 8 tablespoons salted butter, divided (6 tablespoons for potatoes, 2 tablespoons for dotting on top – adds richness and flavor)
- Optional: pinch of salt for seasoning
Instructions
1. Prep the Oven & Dish
Preheat your oven to 375°F (190°C). Lightly butter a medium casserole dish to prevent sticking and promote a golden-brown edge.
2. Cook the Potatoes
Place the peeled, chunked potatoes in a large pot. Cover with cold water by an inch and add a pinch of salt. Bring to a boil over medium-high heat, then reduce to a gentle boil. Cook until tender when pierced with a fork, about 15–20 minutes.
Tip: Use russet or Yukon Gold potatoes for fluffy, creamy mashed potatoes that blend well with cabbage.
3. Prepare the Cabbage
While the potatoes cook, finely shred the green cabbage into thin ribbons. This helps the cabbage soften quickly when mixed into the mash and adds natural sweetness.
4. Warm the Milk & Butter
Gently warm 1 cup milk with 4 tablespoons butter in a small saucepan or microwave. The warm mixture prevents the potatoes from becoming gluey and keeps the mash light and creamy.
5. Mash the Potatoes
Drain the cooked potatoes and return them to the warm pot. Let them sit for 1–2 minutes to release excess steam. Pour in about three-quarters of the milk-and-butter mixture and mash until smooth. Add more milk as needed for a soft, spreadable consistency. Taste and season lightly with salt if desired.
6. Mix in the Cabbage
Fold the shredded cabbage into the hot mashed potatoes. Mix just until evenly swirled, leaving streaks of green for that classic Colcannon look.
7. Assemble the Casserole
Spoon the potato-cabbage mixture into the prepared casserole dish. Smooth the top and create gentle dips for butter pockets. Dot with the remaining 4 tablespoons butter, tucking pieces into the dips for golden, melted goodness.
8. Bake to Perfection
Bake in the preheated oven for 20–25 minutes, until edges are lightly golden and butter pools have melted into shiny pockets.
9. Serve & Enjoy
Let the casserole sit for 5 minutes before serving. Present it in the dish to showcase the creamy potatoes, tender cabbage, and buttery swirls, just like a traditional family recipe.
Benefits & Tips
- Nutrient-packed: Cabbage adds fiber, vitamin C, and antioxidants.
- Comforting & heartwarming: Butter and creamy potatoes make this dish perfect for holidays or weeknight dinners.
- Make-ahead friendly: Prepare mashed potatoes and cabbage in advance; bake before serving.
- Customizable: Add green onions, leeks, or even shredded cheese for extra flavor.
- Perfect side dish: Pairs beautifully with roast chicken, beef, or turkey.
