4-Ingredient Roasted Potatoes and Caramelized Onions: A Sunday Supper Classic
There are some recipes that never need to be complicated to be absolutely unforgettable. This simple roasted potato and caramelized onion dish is one of those timeless classics that fills the whole house with an aroma so warm and inviting, it practically pulls everyone to the dinner table before you even call them. Golden, crispy-edged potatoes tangled with sweet, jammy onions — it’s pure comfort food at its finest.
With just four humble ingredients and a hot oven, you can pull off a side dish that tastes like it took all afternoon. It pairs beautifully with roast chicken, grilled steak, or honestly, just eaten straight from the pan with a little extra black pepper. Once you make it, you’ll understand why it earns a spot on the Sunday supper table week after week.
Ingredients
- 2 pounds (about 900g) Yukon Gold or russet potatoes, peeled and cut into chunky pieces
- 2 large yellow onions, thinly sliced
- 3 to 4 tablespoons olive oil or melted butter
- Salt and freshly cracked black pepper, to taste
Method
- Preheat your oven to 425°F (220°C). Place a sturdy roasting pan or baking dish inside the oven while it heats up — a hot pan gives the potatoes that irresistible golden crust right from the start.
- Peel and chop your potatoes into generous, bite-sized chunks. Pat them dry thoroughly with a clean kitchen towel. Removing excess moisture is the secret to crispiness, so don’t skip this step.
- Thinly slice your onions into rings or half-moon shapes. The thinner they are, the more they will soften, caramelize, and weave themselves beautifully around the potatoes as everything roasts.
- In a large mixing bowl, toss the potatoes and onions together with the olive oil or melted butter. Season generously with salt and a heavy hand of cracked black pepper. Make sure everything is well coated.
- Carefully remove the hot roasting pan from the oven and spread the potato and onion mixture in a single, even layer. Avoid overcrowding — if needed, use two pans so everything has room to roast rather than steam.
- Roast in the preheated oven for 35 to 45 minutes, turning the potatoes once halfway through. You’re looking for deep golden edges on the potatoes and beautifully caramelized, slightly crispy onions throughout.
- Remove from the oven and taste for seasoning. Add a little more salt or pepper if needed, then serve immediately while everything is hot and fragrant.
Tips for the Best Results
Using Yukon Gold potatoes gives you that creamy interior with a perfectly crisp exterior. If you prefer a deeper caramelization on the onions, toss them in a small pinch of sugar before roasting. For extra richness, swap half the olive oil for melted butter — the combination of both gives incredible flavor and color. Make sure your oven is fully preheated and your pan is screaming hot before the potatoes go in. That initial blast of heat is what creates the gorgeous crust you see on every golden piece.
Serving Suggestions
These roasted potatoes and onions are endlessly versatile. Serve them alongside a simple roast chicken or pork tenderloin for a classic Sunday dinner. They also work wonderfully as a hearty breakfast side with eggs. Leftovers reheat beautifully in a hot skillet with a small drizzle of oil, crisping right back up as if they were freshly made.
