This oven baked 5-ingredient Amish onion noodle bake is exactly the kind of comfort food I reach for on a busy weeknight. It’s inspired by those simple church-supper casseroles you see all over the Midwest—humble ingredients, big flavor, and hardly any prep. You literally layer raw sweet onion rings over dry spiral egg noodles, pour a quick creamy mixture over the top, and let the oven do all the work. It’s the kind of dish that somehow disappears faster than anything else on the table, which makes it a go-to when I’m feeding family or bringing something to a potluck after work.
Serve this onion noodle bake hot, straight from the metal pan, with something fresh and crisp on the side to balance the creaminess—think a simple green salad with a tangy vinaigrette or steamed green beans. It also pairs really well with roasted or grilled chicken, pork chops, or even meatloaf if you’re leaning into classic comfort food. For a lighter meal, I’ll sometimes just add a side of sliced tomatoes and cucumbers and call it dinner. Leftovers reheat nicely in the oven or microwave with a splash of milk or broth to loosen the noodles.
Oven-Baked 5-Ingredient Amish Onion Noodle BakeServings: 6
Ingredients
8 oz dry spiral egg noodles
2 large sweet onions, peeled and sliced into rings
2 cups whole milk (or 2% milk)
1 cup sour cream
1 1/2 tsp kosher salt, plus more to taste
1/2 tsp black pepper
2 tbsp unsalted butter, cut into small pieces (for dotting on top, optional but recommended)
Directions
Preheat your oven to 375°F (190°C). Lightly grease a metal 9x13-inch baking pan with a little butter or nonstick spray so the noodles don’t stick.
Spread the dry spiral egg noodles evenly in the bottom of the metal baking pan. They should be in a fairly even layer, but don’t stress if some overlap or stick up a bit.
Slice the sweet onions into 1/4-inch thick rounds and separate them into rings with your hands. Layer the raw sweet onion rings evenly over the dry noodles, covering as much of the surface as you can. This is the moment that should look like the close-up process shot: your hands scattering and layering those onion rings over the bare, uncooked noodles.
In a medium bowl, whisk together the milk, sour cream, kosher salt, and black pepper until the mixture is smooth and pourable. Taste and adjust the seasoning if you like (keeping in mind the flavors will mellow a bit as they bake).
Slowly pour the milk and sour cream mixture evenly over the onions and noodles, making sure to cover the entire pan so the liquid can seep down between the noodles. Gently press down on the onions with the back of a spoon so everything settles into the creamy mixture.
Dot the top with the small pieces of butter, spacing them out across the surface. This helps the onions brown and adds a little extra richness without adding another real ingredient to prep.
Cover the pan tightly with aluminum foil and bake for 40 minutes, until the noodles are starting to soften and most of the liquid is absorbed. The foil helps the dry noodles cook through in the creamy mixture.
Carefully remove the foil and continue baking, uncovered, for another 20–25 minutes, or until the top is lightly golden, the onions are tender and caramelized around the edges, and the noodles are fully cooked. If the top is browning too quickly before the noodles are done, loosely tent with foil again.
Let the casserole rest for at least 10 minutes before serving. This short rest helps the sauce thicken and makes it easier to scoop tidy portions. Taste and sprinkle with a bit more salt and pepper if needed, then serve warm right from the metal pan.
Variations & Tips
If you want to bulk this up into more of a full meal, stir 1–2 cups of cooked, shredded chicken or diced ham into the noodles before layering on the onions. For extra richness, you can swap 1/2 cup of the milk for heavy cream, or stir in 1/2 cup of shredded Swiss, Gruyère, or cheddar cheese with the sour cream mixture (it will still stay close to the original 5-ingredient spirit, just a touch more indulgent). To add a little crunch, sprinkle the top with 1/2 cup of crushed butter crackers or plain breadcrumbs during the last 10 minutes of baking so they don’t burn. If you prefer a stronger onion flavor, mix in one small finely chopped onion with the milk mixture and still layer the rings on top for that classic look. For make-ahead prep, you can assemble the pan (noodles, onions, and creamy mixture) up to 4 hours in advance, cover, and refrigerate; just add 5–10 extra minutes to the covered baking time to account for the cold pan. And if you’re cooking for a smaller household, bake it in two 8x8 metal pans, enjoy one now, and cool and freeze the other for a future busy night—reheat covered at 350°F until hot in the center.
