This oven baked 3-ingredients Amish potato filling is the kind of simple, comforting dish that makes a Sunday dinner feel special without a lot of fuss. The recipe comes from the old Pennsylvania Dutch tradition of turning plain potatoes into something everyone fights over for the last scoop. My grandmother made a version of this every Sunday after church: just fluffy mashed potatoes, rich butter, and eggs baked together until the top turned golden and crisp while the inside stayed soft and creamy. It’s budget-friendly, kid-approved, and perfect for those days when you want real comfort food with almost no prep.
Serve this potato filling hot, straight from the oven, while the top is still crisp and the inside is fluffy. It pairs beautifully with simple roasted or baked chicken, ham, meatloaf, or pot roast. Add a green vegetable like steamed green beans, peas, or a tossed salad to balance the richness. A spoonful of gravy over the top is wonderful but not required—this casserole is flavorful enough on its own. Leftovers (if you’re lucky enough to have any) reheat well alongside scrambled eggs for a cozy breakfast-for-dinner night.
Oven Baked 3-Ingredients Amish Potato FillingServings: 6
Ingredients
3 pounds russet or Yukon Gold potatoes, peeled and cut into chunks
1 cup (2 sticks) unsalted butter, divided
4 large eggs, at room temperature
1 tablespoon kosher salt, plus more to taste
1 teaspoon black pepper, optional
Cooking spray or extra butter, for greasing the baking dish
Directions
Preheat your oven to 375°F (190°C). Lightly grease a 2 to 2 1/2-quart white oval casserole dish (or similar baking dish) with cooking spray or a little butter so the potatoes don’t stick.
Place the peeled, chunked potatoes in a large pot and cover with cold water by about 1 inch. Stir in 1 tablespoon kosher salt. Bring to a boil over medium-high heat, then reduce to a gentle boil and cook until the potatoes are very tender when pierced with a fork, about 15–20 minutes.
While the potatoes cook, melt 3/4 cup (1 1/2 sticks) of the butter in a small saucepan or microwave-safe bowl. Set aside to cool slightly so it’s warm but not scorching hot. Cut the remaining 1/4 cup (1/2 stick) butter into small pieces and keep it chilled for topping.
Drain the cooked potatoes very well, then return them to the hot pot. Let them sit for 1–2 minutes to steam off excess moisture; this helps keep the filling fluffy instead of watery.
Mash the potatoes until smooth using a potato masher or hand mixer on low speed. Avoid overbeating with an electric mixer so they don’t turn gluey. Taste and add a bit more salt if needed, plus pepper if you like.
In a medium bowl, lightly beat the eggs. Slowly whisk the warm melted butter into the eggs in a thin stream, whisking constantly. This gently warms the eggs so they don’t scramble when they hit the hot potatoes.
Pour the egg-and-butter mixture over the mashed potatoes. Stir or beat on low just until everything is thoroughly combined and the potatoes look light and creamy. The mixture will seem a little looser than regular mashed potatoes—that’s perfect for baking.
Spoon the potato mixture into the prepared casserole dish and smooth the top with a spatula, making gentle swirls or ridges. Those little peaks will crisp and brown beautifully in the oven.
Dot the top evenly with the remaining 1/4 cup (1/2 stick) cold butter pieces. This is what gives you that irresistible golden, crispy, buttery crust that everyone fights over.
Bake, uncovered, in the preheated oven for 30–40 minutes, or until the top is puffed, lightly golden brown, and the edges are just starting to crisp. If you like a deeper color, you can turn the broiler on for 1–2 minutes at the end—just watch closely so it doesn’t burn.
Remove the casserole from the oven and let it rest for about 5–10 minutes. The filling will set slightly as it cools, making it easier to scoop while staying fluffy inside with a crispy top.
Serve warm, straight from the dish, making sure everyone gets a bit of that golden, buttery crust along with the soft, creamy potatoes underneath.
Variations & Tips
For a slightly richer version, you can replace 1/4 cup of the melted butter with heavy cream or half-and-half, whisking it into the eggs before adding to the potatoes. If you have picky eaters, keep the recipe as-is and let everyone add their own toppings at the table—shredded cheese, chopped chives, or crumbled cooked bacon are all big hits with kids. To stretch the dish for a larger group, increase the potatoes to 4 pounds and add one extra egg; bake in a 3-quart casserole and extend the baking time by 5–10 minutes, watching for that same golden top. For a slightly tangy, more old-fashioned flavor, you can mash in 1/4–1/2 cup of sour cream or plain Greek yogurt with the potatoes before adding the egg mixture. If you need to make this ahead, you can assemble the casserole up to the point of baking, cover tightly, and refrigerate for up to 24 hours; remove from the fridge while the oven preheats, then bake, adding 5–10 extra minutes as needed until hot and golden. Food safety tips: Always cook the potatoes until fully tender and bake the casserole until the center is hot and the eggs are fully set (an instant-read thermometer should read at least 160°F in the middle). Don’t leave the baked casserole at room temperature for more than 2 hours; refrigerate leftovers promptly in a shallow container and use within 3–4 days. Reheat leftovers until steaming hot all the way through before serving. If you’re cooking for anyone with egg or dairy allergies, this recipe is not suitable without substitutions—do not omit the eggs entirely, as they are key to the structure of the dish.
