Every March, my Irish-American auntie reminds me that there is exactly one acceptable way to eat potatoes: mashed, shaped into little cakes, and baked until the edges go golden and crisp. These oven baked 4-ingredients Irish potato cakes are my busy-week version of her stovetop classic. They keep all the cozy, old-school charm of traditional Irish potato cakes (or “fadge”) but skip the frying and extra fuss. With just potatoes, butter, green onions, and salt, you get crisp outsides, fluffy centers, and those pretty green flecks that make them feel just a little bit special for St. Patrick’s season—or honestly, any weeknight when you need something comforting but simple.
Serve these potato cakes hot from the oven with a little extra butter on top and a sprinkle of flaky salt if you have it. They’re perfect next to roasted chicken, sausages, or a simple green salad when you’re trying to keep dinner light but still satisfying. For brunch, slide a fried or poached egg on top and add some sliced tomatoes or sautéed spinach. They also make a great base for leftover corned beef or roasted veggies—think of them like a cozy, potato-y toast that goes with just about anything.
Oven Baked 4-Ingredients Irish Potato CakesServings: 4
Ingredients
2 pounds russet or Yukon Gold potatoes, peeled and cut into chunks
4 tablespoons unsalted butter, plus more for greasing the pan
4 green onions (scallions), finely sliced
1 teaspoon fine salt, plus more to taste
Directions
Preheat your oven to 400°F (200°C). Lightly grease a dark metal baking sheet with a thin layer of butter so the potato cakes don’t stick and can crisp up nicely.
Place the peeled, chunked potatoes in a large pot and cover with cold water by about 1 inch. Add a pinch of salt if you like, then bring to a boil over medium-high heat. Reduce to a gentle boil and cook until the potatoes are very tender when pierced with a fork, about 15–20 minutes.
Drain the potatoes well and return them to the warm pot. Let them sit for 1–2 minutes so excess steam can escape—this helps keep the mixture from getting gummy.
Add the 4 tablespoons of butter and the 1 teaspoon of fine salt to the hot potatoes. Mash until smooth and fluffy, with no big lumps. Taste and add a little more salt if needed; the mixture should taste well-seasoned at this point.
Stir in the finely sliced green onions until they’re evenly distributed, giving you little green flecks throughout the mash.
Let the potato mixture cool until it’s comfortable to handle, about 5–10 minutes. This makes it easier to shape into patties that hold together.
Scoop out portions of the potato mixture (about 1/4 cup each) and roll them gently into balls, then flatten into round patties about 1/2 inch thick. Place each patty on the greased dark metal baking sheet, leaving a little space between them.
For extra crisp edges, lightly dab or rub a tiny bit of butter on the tops of each potato cake. This helps them turn golden in the oven.
Bake in the preheated oven for 15–20 minutes, then carefully flip each potato cake with a spatula. Return to the oven and bake for another 10–15 minutes, or until both sides are golden with crisp edges and the green onion flecks look bright.
Remove the baking sheet from the oven and let the potato cakes sit for 3–5 minutes to firm up slightly. Serve warm, straight from the pan, with a little extra salt if desired.
Variations & Tips
If you want to prep ahead, you can shape the potato cakes earlier in the day, place them on the greased baking sheet, cover, and refrigerate for a few hours until you’re ready to bake—just add a couple of extra minutes to the baking time. For a slightly richer version without adding new ingredients, bump the butter up to 5 or 6 tablespoons and reduce the salt just a bit, tasting as you go. You can also play with texture: mash the potatoes very smooth for a more uniform cake, or leave some small chunks for a rustic feel. If you don’t have russet or Yukon Gold, any starchy or all-purpose potato will work; just avoid very waxy varieties, which can make the mixture a little dense. To freeze, bake the potato cakes until just golden, cool completely, then freeze in a single layer and reheat directly from frozen on a hot baking sheet until crisp again. And if you’re making these for a crowd, you can easily double the recipe and use two baking sheets, rotating them halfway through for even browning.
