| Prep | 20 minutes |
| Cook | about 50 minutes (25 on the stove, 25 in the oven) |
| Total | about 1 hour 20 minutes, including 10 minutes to rest |
| Serves | 6 |
| Equipment | 3-quart baking dish (oval or 9×13-inch), large skillet, large pot, potato masher, fork, rimmed baking sheet |
If your cottage pie comes out of the oven with a soupy filling that floods the plate, or a potato topping that sinks into the meat, the problem almost always starts on the stove. A filling that goes into the dish thin and watery stays that way in the oven, and soft, wet mashed potatoes slide right into it instead of sitting on top as a golden crust.
This Irish cottage pie fixes both. The ground beef filling is thickened with a little flour and simmered with tomato paste, Worcestershire sauce and thyme until it is glossy and spoonable, not runny. The mashed potatoes are made a little stiffer than you would serve on their own, with an egg yolk stirred in so they hold their shape and brown beautifully. The result slices into neat portions: a rich, savory beef and vegetable layer under a crisp, ridged potato top.
Ingredients
For the beef filling
- 1 tbsp olive oil and 1 tbsp butter.
- 1 medium yellow onion, finely diced, and 2 medium carrots, peeled and diced small – small pieces soften fully in the short simmer.
- 2 garlic cloves, minced.
- 1 1/2 lb (680 g) ground beef, 85% lean.
- 2 tbsp tomato paste – deepens the color and flavor of the gravy.
- 2 tbsp all-purpose flour – the thickener that keeps the filling from turning soupy.
- 1 1/4 cups (300 ml) beef broth.
- 1 tbsp Worcestershire sauce.
- 1 tsp fresh thyme leaves (or 1/2 tsp dried), 1 tsp salt and 1/2 tsp black pepper.
- 1 cup (140 g) frozen peas.
For the potato topping
- 2 1/2 lb (1.1 kg) russet or Yukon Gold potatoes, peeled and cut into even chunks – russets make the fluffiest mash, Yukon Golds the creamiest.
- 4 tbsp (56 g) salted butter – Irish butter adds a richer flavor.
- 1/2 cup (120 ml) warm milk.
- 1 large egg yolk – helps the topping hold its shape and brown in the oven.
- Salt, to taste, and chopped parsley for serving.
How to Make It
1. Boil the potatoes – 15 to 20 minutes
Put the potato chunks in a large pot, cover with cold water by about 1 inch and add a big pinch of salt. Bring to a boil, then simmer until a knife slides into the largest piece with no resistance. Heat the oven to 400°F (200°C) while the potatoes cook. Starting in cold water cooks the chunks evenly, so the outsides do not turn to mush before the centers are done.
2. Start the filling – medium heat, 6 minutes
While the potatoes cook, heat the oil and butter in a large skillet over medium heat. Add the onion and carrots and cook, stirring now and then, until the onion is soft and translucent. Add the garlic for the last minute. The carrots will still have a little bite; they finish softening in the gravy.
3. Brown the beef – medium-high, 8 minutes
Raise the heat, add the ground beef and break it into small pieces. Cook until no pink remains and some bits start to brown. Spoon off excess fat if there is a lot. Ground beef is safe at 160°F (71°C); browned crumbles mean extra flavor in the gravy.
4. Thicken the filling – medium-low, 8 to 10 minutes
Stir in the tomato paste and flour and cook for 1 minute, until no dry flour remains. Add the broth, Worcestershire sauce, thyme, salt and pepper, bring to a simmer and cook, stirring occasionally, until the sauce thickens. Stir in the frozen peas and take the skillet off the heat. The filling should be thick enough that a spoon dragged across the pan leaves a trail for a second or two.
5. Mash the potatoes – 5 minutes
Drain the potatoes well and let them steam in the colander for 2 minutes. Return them to the pot and mash with the butter and warm milk until smooth, then season with salt. Let them cool for a few minutes before beating in the egg yolk. The mash should be thick and hold soft peaks; if it looks loose, skip the rest of the milk.
6. Assemble – 5 minutes
Spread the beef filling in the baking dish. Spoon the mashed potatoes over the top in dollops, starting around the edges, then spread them gently to seal the filling in. Drag a fork across the surface to make ridges. The ridges are what turn crisp and golden in the oven, so make them generous.
7. Bake – 400°F (200°C), 20 to 25 minutes
Set the dish on a rimmed baking sheet to catch any drips and bake until the filling bubbles at the edges and the potato ridges are golden. For a deeper color, broil for the last 2 to 3 minutes, watching closely. Let the pie rest for 10 minutes before serving. Resting lets the gravy settle so each portion holds together when you scoop it.
Why the Filling Is Thickened First
Cottage pie bakes for a short time at a high temperature, just long enough to heat everything through and brown the potatoes. That is not enough time for a thin, watery filling to reduce, so it needs to be the right texture before it goes into the dish. The flour, cooked briefly with the tomato paste, thickens the broth into a gravy as it simmers, and the frozen peas are added at the very end so they stay green and do not release extra water.
The same logic applies to the potatoes. Draining them well and letting them steam dry gets rid of excess water, and the egg yolk adds structure. A stiff mash floats on a thick filling; a wet mash on a thin filling sinks.
Cottage Pie vs. Shepherd’s Pie
The two names are often used as if they mean the same thing, but they describe different dishes. Cottage pie is made with beef, usually ground, while shepherd’s pie is traditionally made with lamb, which is where the name comes from. The method is almost identical: a savory meat filling in gravy, topped with mashed potatoes and baked. To turn this recipe into a shepherd’s pie, simply replace the beef with the same amount of ground lamb and add 1 teaspoon of chopped fresh rosemary with the thyme.
If you like this kind of hearty, oven-finished dinner, our tater tot casserole with ground beef uses the same idea with a crispy potato topping, and the crockpot beef stew delivers a similar beef-and-gravy flavor without the oven.
Mistakes to Avoid
- A thin filling. If the gravy is still loose after 10 minutes, simmer a few minutes longer. It will not thicken much in the oven.
- Wet potatoes. Water left in the potatoes makes the topping sink. Drain thoroughly and let them steam before mashing.
- Adding the egg yolk to piping hot potatoes. Let the mash cool for a few minutes first so the yolk blends in smoothly instead of setting.
- Smoothing the top flat. A flat surface browns unevenly. Fork ridges give you crisp edges all over.
- Cutting in right away. Straight from the oven the filling runs. Ten minutes of rest makes all the difference.
Make Ahead and Freezing
Assemble the whole pie, let it cool, cover tightly and refrigerate for up to 24 hours. Bake straight from the fridge at 400°F (200°C) for 35 to 45 minutes, until the center is hot. To freeze, assemble the pie in a freezer-safe dish, wrap it well and freeze for up to 3 months. Thaw overnight in the refrigerator before baking as above. Leftovers keep in the refrigerator for 3 to 4 days; reheat portions until they reach 165°F (74°C) in the center. Both temperatures are listed on the FoodSafety.gov safe minimum temperature chart.
Frequently Asked Questions
Can I use leftover or store-bought mashed potatoes?
Yes. You will need about 5 cups. Leftover mash is often stiffer once chilled, which is an advantage here; warm it slightly so it spreads easily.
What makes this cottage pie Irish?
Cottage pie is a classic of home cooking in Ireland and Britain. For a more Irish flavor, replace 1/2 cup of the broth with a dry Irish stout, and use salted Irish butter in the mash. The stout adds a deep, slightly bitter note to the gravy; let it simmer the full 10 minutes.
Can I add cheese?
Sprinkle 1 cup of shredded sharp cheddar over the potatoes before baking. It browns faster, so start checking after 15 minutes.
What should I serve with it?
It is a complete meal, but buttered green beans, a simple salad or a slice of crusty no-knead bread round it out. For a holiday table, it pairs well with a cheesy green bean casserole.
Find more comforting ideas among our dinner recipes.
Irish Cottage Pie
Ingredients
Method
- Cover the potatoes with cold salted water, bring to a boil and simmer 15 to 20 minutes, until a knife slides in easily. Heat the oven to 400°F (200°C).
- Meanwhile, heat the oil and butter in a large skillet over medium heat. Cook the onion and carrots about 6 minutes until the onion is soft, adding the garlic for the last minute.
- Raise the heat, add the beef and cook, breaking it up, until no pink remains (160°F / 71°C). Spoon off excess fat.
- Stir in the tomato paste and flour for 1 minute. Add the broth, Worcestershire sauce, thyme, salt and pepper and simmer 8 to 10 minutes until thick. Stir in the peas and remove from the heat.
- Drain the potatoes, let them steam 2 minutes, then mash with the butter and warm milk. Season, cool a few minutes and beat in the egg yolk.
- Spread the filling in a 3-quart baking dish, cover with the mashed potatoes and make ridges with a fork.
- Bake on a rimmed baking sheet 20 to 25 minutes, until bubbling and golden. Broil 2 to 3 minutes for more color if desired. Rest 10 minutes and sprinkle with parsley.
Notes
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