This oven baked 4-ingredient onion gravy potato bake is the kind of simple comfort food that earns a permanent spot in the dinner rotation after just one bite. It turns basic pantry staples into a creamy, savory side with tender slices of potato and lots of rich onion flavor, and it always reminds me of those dependable potluck dishes that somehow disappear before anything else on the table.
Serve this potato bake alongside roast chicken, meatloaf, pork chops, ham, or a simple weeknight rotisserie chicken. It also fits right in at holiday dinners, church suppers, and family gatherings, especially with green beans, a crisp salad, or buttered peas to balance the richness.
Oven Baked 4-Ingredient Onion Gravy Potato Bake
Servings: 6
Ingredients
2 pounds russet or Yukon Gold potatoes, peeled and thinly sliced
1 packet dry onion gravy mix
1 1/2 cups heavy cream
2 tablespoons butter, melted
Directions
1. Preheat the oven to 375°F and lightly grease a medium baking dish or casserole dish.
2. In a large bowl, whisk the dry onion gravy mix into the heavy cream until smooth and well combined.
3. Layer half of the sliced potatoes in the prepared dish, pour over half of the cream mixture, then repeat with the remaining potatoes and cream mixture. Drizzle the melted butter evenly over the top.
4. Cover the dish tightly with foil and bake for 50 minutes. Remove the foil and continue baking for 20 to 30 minutes, or until the potatoes are fork tender and the top is bubbling with golden browned edges.
5. Let the potato bake rest for 10 minutes before serving so the sauce can thicken slightly and the layers hold together better when scooped.
Variations & Tips
Make it cheesier: If you want an extra cozy version, sprinkle a little shredded sharp cheddar or mozzarella over the top during the last 10 minutes of baking. It is no longer a strict 4-ingredient recipe, but it is absolutely delicious.
Choose the right potato: Russets give you a softer, more classic baked texture, while Yukon Golds hold their shape a bit better and add a buttery flavor. Either works well, so use what you have on hand.
Slice evenly: Try to keep the potato slices about 1/8 inch thick so they cook at the same rate. A mandoline makes this easy on busy nights, but a sharp knife works just fine too.
Prep ahead: You can assemble the dish a few hours in advance, cover it, and refrigerate until baking time. If it goes into the oven cold from the fridge, add about 10 extra minutes to the covered baking time.
Boost the flavor: A light sprinkle of black pepper, chopped parsley, or a little garlic powder on top before serving adds nice color and a little extra flavor without changing the easy spirit of the recipe.