It’s 5 PM. You’re staring into the fridge. Leftover corned beef from St. Patrick’s Day is staring back. We’ve all been there.
You want something yummy. Something fast. You do not want to spend an hour washing dishes. I hear you. That’s why we’re making this Irish Cast Iron Skillet Corned Beef Colcannon Casserole.
It’s your hero move for a crazy weeknight. We’re talking one pan, 30 minutes, and crazy-good flavor. Let’s turn those leftovers into a win.
Recipe Overview
- Cuisine: Irish-American
- Category: Main Dish
- Prep Time: 10 minutes
- Cook Time: 20 minutes
- Total Time: 30 minutes
- Servings: 4-6
Ultimate Guide to Irish Cast Iron Skillet Corned Beef Colcannon Casserole
This is the only guide you need. Why? Because it solves three big problems at once.
First, flavor. We’re mixing creamy colcannon with savory corned beef and a crispy cheese top. It’s a total comfort food bomb.
Irish Cast Iron Skillet Corned Beef Colcannon Casserole Recipe
The Simple Ingredients
Let’s Get Cooking! (The Step-by-Step)
Notes
Enjoy your homemade Irish Cast Iron Skillet Corned Beef Colcannon Casserole Recipe!
Second, speed. From fridge to table in half an hour. That’s faster than delivery.
Third, ease. One skillet does it all. You cook, bake, and serve from the same pan. Cleanup is a dream.
This recipe is your secret weapon. It turns simple ingredients into a superstar dinner. No fuss, all flavor.
The Simple Ingredients
I love this list. It’s mostly pantry staples and leftovers. No fancy trips to the store needed.
- 2 tbsp butter or olive oil
- 1 small yellow onion, chopped
- 3 cups leftover cooked corned beef, chopped (about 1 lb)
- 4 cups mashed potatoes (leftover or from a refrigerated tub!)
- 3 cups chopped cabbage or kale (bagged coleslaw mix works great)
- 1/2 cup beef broth or milk
- 1 cup shredded sharp cheddar cheese, divided
- 1/2 tsp black pepper
- Salt to taste (careful, the corned beef is salty!)
- 2 green onions, sliced (for garnish)
Let’s Get Cooking! (The Step-by-Step)
Ready? Grab your trusty cast iron skillet. This is where the magic happens. Follow these steps and dinner is done.
- Preheat your oven to 400°F (200°C). Put your skillet on the stove.
- Heat the butter or oil in the skillet over medium heat. Add the chopped onion. Cook for 3-4 minutes until it’s soft.
- Add the chopped corned beef. Stir and cook for another 3 minutes to get a little crisp on the edges.
- Add the cabbage or kale. Pour in the broth or milk. This creates steam to wilt the greens. Cook for 4-5 minutes, stirring, until the cabbage is tender.
- Turn off the stove heat. Fold in the mashed potatoes and half of the cheddar cheese. Mix it all until it’s combined. Smooth the top with a spoon.
- Sprinkle the rest of the cheese evenly over the top. This makes that perfect, golden crust.
- Transfer the skillet to the hot oven. Bake for 15-20 minutes. You want the cheese melted and the edges bubbly.
- Carefully remove it. Let it sit for 5 minutes. Top with green onions. Then, dig in!
What to Serve With This Dish
This casserole is a full meal by itself. But if you want to round it out, keep it simple.
A quick green salad with a tangy vinaigrette is perfect. It cuts through the richness.
Some crusty bread or dinner rolls are great for scooping up every last cheesy bit. No effort needed.
That’s it! A complete, satisfying dinner with almost zero extra work. You’ve got this.
Make This Recipe Your Own (Quick Swaps)
Don’t have exactly these ingredients? No stress. This recipe is super flexible.
Swap the meat: Use diced ham or roasted chicken instead of corned beef. It’s just as tasty.
Swap the greens: No cabbage? Use chopped broccoli or even frozen peas. Throw them in with the onions.
Swap the cheese: Swiss, Monterey Jack, or even a Irish cheddar like Dubliner are all amazing here.
How to Store Leftovers (If You Have Any!)
Let the casserole cool completely. Cover the skillet tightly with foil or transfer portions to an airtight container.
It will keep in the fridge for up to 4 days. Reheat single servings in the microwave for a fast lunch.
You can also freeze it for up to 2 months. Thaw in the fridge overnight and reheat in a 350°F oven until warm throughout.
NUTRITION INFORMATION
(This is an estimate per serving, based on 6 servings.)
- Calories: ~420
- Protein: 22g
- Carbohydrates: 28g
- Fat: 24g
- Saturated Fat: 11g
- Fiber: 3g
- Sugar: 4g
FREQUENTLY ASKED QUESTIONS
I don’t have a cast iron skillet. Can I still make this?
Yes! Use any oven-safe skillet or a 9×13 baking dish. Just cook the meat and veggies in a regular pan, then mix everything and transfer to your greased dish to bake.
What if I don’t have leftover corned beef?
You can use deli-sliced corned beef from the grocery store. Chop it up! Or, see the swaps above for other meats. It’s all good.
Can I make this ahead of time?
Absolutely. Assemble the whole casserole in the skillet. Cover and refrigerate for up to a day. When ready, bake it straight from the fridge. You might need to add 5-10 extra minutes to the bake time.
See? I told you this was the ultimate busy-cook solution. Maximum flavor, minimum effort, and only one pan to wash.
You just turned a fridge-cleanout into a family favorite. That’s a major weeknight victory.
Go try this and win back your weeknight! Let me know how it goes by leaving a comment and rating below!
