This oven baked 3-ingredient vinegar and onion potato bake is the kind of simple, budget-friendly comfort food that earns a permanent spot in the dinner rotation. Recipes like this came out of making do with pantry basics, and that humble mix of potatoes, onions, and vinegar turns into something surprisingly tender, savory, and deeply cozy after a slow bake. It is the sort of dish that feels old-fashioned in the best way, especially when you want something filling without a long grocery list.
Serve this potato bake alongside roast chicken, pork chops, sausage, or even a couple of fried eggs for an easy meal. It also works well with green beans, a simple cucumber salad, or buttered peas to balance the richness of the potatoes and sweet onions. If you are bringing it to the table for a casual family dinner, a little black pepper and chopped parsley on top are all it needs.
Oven Baked 3-Ingredient Vinegar and Onion Potato Bake
Servings: 6
Ingredients
2 pounds russet or Yukon Gold potatoes, peeled and thinly sliced
1 large yellow onion, thinly sliced
1/2 cup white vinegar
Directions
1. Preheat the oven to 375°F and lightly grease a medium glass baking dish. Peel the potatoes and slice them thinly, then thinly slice the onion.
2. Layer half of the potatoes in the baking dish, top with half of the onions, and sprinkle over half of the vinegar. Repeat with the remaining potatoes, onions, and vinegar, spreading everything as evenly as possible.
3. Cover the dish tightly with foil and bake for 45 minutes. Remove the foil and continue baking for 25 to 35 minutes more, or until the potatoes are fork tender and the top is golden with browned edges.
4. Let the potato bake rest for 10 minutes before serving so the layers can settle slightly and the onions finish softening into the potatoes.
Variations & Tips
Add seasoning: Even though the classic version keeps things extra simple, a little salt and black pepper go a long way. If your pantry allows, season each layer lightly so the potatoes taste fuller and more balanced.
Choose the right potato: Russets bake up soft and fluffy, while Yukon Golds hold their shape a little more and give a creamier texture. Either works well, but try to slice them evenly so the whole dish cooks at the same pace.
Make it ahead: You can assemble the dish a few hours in advance and keep it covered in the refrigerator until baking time. This is helpful on busy weeknights when you want dinner prepped before the workday gets hectic.
Adjust the tang: If you are new to cooking with vinegar, start with a little less and add more next time if you want a sharper flavor. The vinegar mellows as it bakes, leaving behind a gentle tang that cuts through the sweetness of the onions.