Irish potato casserole is creamy, cheesy, and baked until golden—perfect for St. Patrick’s Day or any family meal. Easy, hearty, and crowd-pleasing!
Irish potato casserole is a warm, comforting side dish made with creamy mashed potatoes, flavorful mix-ins, and a golden baked topping that makes it perfect for family dinners or holiday gatherings. This versatile recipe pairs well with traditional Irish meals like corned beef or can be enjoyed alongside roasted meats and vegetables any time of year. Whether you’re making it for St. Patrick’s Day or just looking for a hearty potato dish to serve at the table, this Irish potato casserole is sure to be a crowd-pleaser.
It’s March which means it’s almost St. Patrick’s Day! Sure, the Americanized version of the holiday is nothing even close to the actual Irish celebration, but it is a good excuse for some amazing potato food! With that being said, along came the Irish Potato Casserole. When it’s not close to St. Patrick’s Day, I just call this my mashed potato casserole, since that’s basically what this is.
Justin’s family is of Irish descent. We decided one year we needed to make something to celebrate besides having Guinness and Baileys! I really don’t know just how Irish this potato casserole really is, but we enjoy it. Potatoes are one of my favorite foods. In high school, I would come home and my snack of choice was usually a bag of instant mashed potatoes!
I started searching for some Irish recipes and came across a few that I combined into this delicious dish. It can serve as a main course or a side dish. We often make it as a main dish when it is just us. But I have made it as a side when we have other people over. This makes an entire 9×13 casserole dish full of potatoes, so it’s a lot to eat.
Luckily, it does reheat pretty well so we will eat the leftovers the next day. I just like to add a bit more butter when I reheat to help bring the creamy texture back into the potatoes.
What is Irish Potato Casserole?
Irish potato casserole is a comforting dish that combines creamy mashed potatoes with simple, flavorful mix-ins, then bakes them until golden and slightly crisp on top. The result is a hearty side dish that is both rustic and satisfying, perfect for pairing with traditional Irish meals or serving at family gatherings. This dish is often enjoyed during St. Patrick’s Day celebrations, but its versatility makes it a delicious option year-round.
Ingredients Commonly Used in Irish Potato Casserole
While every household may have its own variation, Irish potato casserole typically starts with fluffy mashed potatoes as the base. Chives, green onions, or leeks are often added for a mild onion flavor. Richness comes from butter, sour cream, or cream cheese, creating a creamy texture. Some recipes incorporate shredded cheese, giving the casserole a melty, savory finish. The topping may be as simple as breadcrumbs for crunch or extra cheese baked until bubbly.
Serving Ideas for Irish Potato Casserole
This casserole pairs beautifully with roasted meats such as corned beef, baked chicken, or glazed ham. It also works well as part of a vegetarian meal when served with roasted vegetables or a fresh garden salad. For holiday gatherings, Irish potato casserole makes an excellent addition to the table alongside other traditional dishes like soda bread or cabbage. Leftovers reheat well, making it a great option for meal prep.
Variations of Irish Potato Casserole
One of the best parts of this dish is how adaptable it can be. For extra flavor, consider mixing in garlic, caramelized onions, or crispy bacon. To lighten it up, try using Greek yogurt in place of sour cream. You can also add vegetables such as spinach or peas for more color and nutrition. For a heartier version, layer in cooked ground beef or corned beef to make it more of a main dish.
Tips for Making the Best Irish Potato Casserole
To achieve the perfect texture, make sure your potatoes are well-drained before mashing so the casserole doesn’t turn watery. Use room temperature butter and dairy to blend more smoothly into the potatoes. For an extra-crispy topping, sprinkle breadcrumbs mixed with a little melted butter over the casserole before baking. Allow the dish to rest for a few minutes after coming out of the oven to make slicing and serving easier.
Irish Potato Casserole FAQ
Yes, Irish potato casserole can be prepared ahead of time. Assemble the casserole, cover it tightly, and refrigerate it for up to 24 hours before baking. When ready to serve, bake as directed, adding a few extra minutes to ensure it is heated through.
Irish potato casserole freezes well, making it a convenient make-ahead dish. After baking, allow the casserole to cool completely, then wrap it tightly with foil or transfer it to an airtight container. Freeze for up to three months. To reheat, thaw in the refrigerator overnight and warm in the oven until heated through.
Starchy potatoes like russet or Yukon gold are ideal because they mash easily and create a fluffy, creamy texture. Waxy potatoes can be used, but they tend to hold their shape and won’t be as smooth when mashed.
To reheat leftovers, place the casserole in an oven-safe dish, cover with foil, and warm at 350°F until hot in the center. For a quicker option, individual servings can be microwaved, though the topping may not stay as crispy.
Yes, Irish potato casserole is naturally gluten-free as long as all the ingredients used are free from gluten. Be sure to check labels on items like sour cream, cheese, and breadcrumbs if you are preparing it for someone with gluten sensitivities.
Irish Potato Casserole Step by Step
Ingredients
- 8-10 Yukon gold potatoes
- 8 oz cream cheese
- 8 oz sour cream
- 1/2 cup butter
- 1/2 tsp salt
- 1/4 cup fresh chives (chopped)
- 1 pinch Paprika
- 1 tsp onion powder
- 1 tsp garlic powder (or 1 clove garlic, minced)
- 1 cup cheddar cheese (shredded)
Instructions
Cut the potatoes into cubes and place them in a large stockpot. Fill with enough water to cover the Yukon golds and bring to a boil. Reduce the heat to medium-low, cover, and simmer for 20 minutes or until the potatoes are fork-tender.
Preheat the oven to 350 degrees F when the potatoes are almost done cooking.
Meanwhile, in a medium bowl, add all of the other ingredients. You can start to mix them now, but if you wait until the potatoes are in there it softens everything and makes it easier to mix.
When the potatoes are done, drain the pot then add the potatoes to the mixing bowl. Use a potato masher to thoroughly combine everything.
Place potato mixture into a 9×13 glass prepared baking dish or 2-quart baking dish and smooth with a rubber spatula.
Bake for about 30 minutes in the preheated oven, until the edges are bubbling and the cheese melts. Serve warm and sprinkle top with paprika.
Irish Potato Casserole Leftovers
Storage: Leftover Irish potato casserole can be stored in an airtight container in the refrigerator for up to 4 days.
Reheating: Reheat it in the oven at 350°F until warmed through, or microwave individual portions for a quicker option.
Freezing: For longer storage, freeze the casserole in a sealed container for up to 3 months and thaw overnight in the refrigerator before reheating.
Recipe
Originally Published On: March 24, 2018
Last Updated On: September 30, 2025
Irish Potato Casserole
Ingredients
- 8-10 Yukon gold potatoes
- 8 oz cream cheese
- 8 oz sour cream
- 1/2 cup butter
- 1/2 tsp salt
- 1/4 cup fresh chives (chopped)
- 1 pinch Paprika
- 1 tsp onion powder
- 1 tsp garlic powder (or 1 clove garlic, minced)
- 1 cup cheddar cheese (shredded)
Recommended Equipment
Instructions
- Cut the potatoes into cubes and place in a large stockpot
- Fill with enough water to cover the potatoes and bring to a boil
- Reduce the heat to medium-low, cover, and simmer for 20 minutes or until the potatoes are fork-tender
- Preheat the oven to 350F when the potatoes are almost done cooking
- Meanwhile, in a mixing bowl, add all of the other ingredients (you can start to mix them now, but if you wait until the potatoes are in there it softens everything and makes it easier to mix)
- When the potatoes are done, drain the pot then add the potatoes to the mixing bowl
- Use a potato masher to thoroughly combine everything
- Spoon the potato mixture into a 9×13 glass baking dish and smooth with a rubber spatula
- Bake for about 30 minutes, until the edges are bubbling
- Serve warm
All nutritional information is based on third-party calculations and should be considered estimates. Actual nutrition content will vary based on brands used, measuring methods, portion sizes, and more.
Irish-Inspired Recipes
- No Yeast Vegan Irish Soda Bread in an Hour
- Irish Potato Casserole
- Corned Beef
- Guinness Beef Stew with Mashed Potatoes
- Homemade Creme de Menthe + Drink Recipes
- Kale Beef Stew with Smashed Potatoes
- Corned Beef Hash Breakfast Toast
- Bailey’s Irish Cream Buttercream Frosting Recipe
I feel like I would be unsure of the texture, however I love anything having to do with potatoes so I may just try it out anyway. Gotta stop being picky, right?
The texture is very similar to regular mashed potatoes. It comes out very creamy.
This looks amazing. I’m going to have to try it and perhaps add some bacon.
I personally don’t care for bacon, but my husband has mentioned that it would probably be really good in this, too!
This sounds so delicious. I love meals that you can heat up the next day and just continue to enjoy!
Me too! I really don’t like trying to find lunch every day, so it’s great when I have something I can just heat up quickly.
This is a recipe I can remember having as kid at my grandma’s house. It is like the ultimate comfort food. And it sounds easy enough I could whip it up at home too. Perfect for St. Patty’s Day Weekend!
Definitely comfort food here! And the hardest part is prepping the potatoes. The rest is just mixing, spreading, and baking. We plan to make it again for a St. Patrick’s meal!
5 minutes prep time to peel and shred 2 cups of potatoes, beat some cream, mince onion, shred 1/2 cup cheese? Let’s get real. Like the recipe.
I’m not sure where you’re getting 5 minutes prep time. The recipe lists it as 45 minutes of prep time plus 30 minutes to bake.
I was going to say .. not sure where it says 5 minutes of prep time… No way could I do all that in 5 minutes. 😂
Excellent! I’ve made this and variations thereof for years. I sometimes add dill and or garlic – some green onions makes it rather like a champ casserole its a great side for holidays – For my own taste though, I do use double the potatoes – this is an excellent recipe. thanks!
I’ve never heard of champ casserole before, but when I just looked it up, the two do seem very similar. I’ll have to try the dill, garlic, and green onions next time, those do sound like a great addition!
This is delicious! I made it today for lunch and my family loved it. Thanks for sharing, didn’t take much time to prep which I loved.
I’m so glad your family enjoyed this! It’s so hard to gauge the prep time since it depends on how fast the potatoes cook. I prefer to overestimate so it doesn’t take anyone by surprise.
It looks super yummy! I dont think I’ve ever had a Irish potato casserole but I will put it in my save box for recipes!
I hope you get to try it soon! It basically takes mashed potatoes to the next level.
Love the ingredients in this recipe. Also great that I have everything i need to try this. Looks delicious!
I try to cook with basic ingredients to make it easy to replicate the recipes. We also like to use as little packaged food as possible.
I think my mom used to make something like this when I was a kid. It was delicious!
We always had regular mashed potatoes, so I wanted to bring them up to another level with this. How awesome that you had a similar meal growing up!
I’ve never heard of this but I’m here for anything involving potatoes!
Right?! Potatoes are one of my favorite foods!
Seriously, it’s like you looked deep into my soul and published this just for me. My love for potatoes is infinite but my method of preparing them isn’t. I’ve never made anything like this and can’t wait to try this!
I absolutely love potatoes, too, and am also on the lookout for new recipes all the time. I’m glad I could give you a new one to try!
Now this is my kind of recipe!!! I love potatoe everything!! This sounds absolutely delicious!!! What a great recipe for st. Patrick’s day!
Thanks! I love potatoes, too. They are one of my favorite foods!
Potatoes are a staple in this house, but I have never made this before. I make a lot of potato salad honestly. This casserole looks like it would be incredible!
Yum, I love potato salad, too! This is very different, though, and is more similar to mashed potatoes. But both are delicious!
ooo this will be perfect timing for the St Patricks day celebrations this weekend. Looks like this will tasty yumy too xx
We originally made it many years ago for St. Patrick’s Day, too! It’s perfect for this time of the year.
wow, that looks so yummy, I didnt know about this receip, it looks easy and I am so sure kids will love them. Love your blog is plenty of yummy receips I cant stop checkin and checkin.
If the kids like mashed potatoes, then I’m sure they would love this casserole. It takes mashed potatoes to a whole new level with added flavors and creaminess.
Can this be mixed one day, overnight in the fridge and cooked the next day?
I haven’t personally tried that with this recipe, but have with other similar recipes. It should work. Make sure you either let the pan come to room temperature if it’s in glass or put it in the cold oven. If you put a cold glass pan in a hot oven it could shatter (I’ve had that happen to me before). It may also take a few extra minutes to bake and warm through.
it looks like you do not peel potatoes
is that true?
Correct, I do not because I like the taste and texture of the potato peels. If you want, you could peel the potatoes when you make it. The texture will just be a bit softer.