There’s something comforting about the smell of potatoes and onions roasting in the oven—the tiny ritual that turns everyday ingredients into something cozy and unforgettable. If you’ve ever wanted a side dish that feels like a warm hug but is shockingly easy to make, this is it. You’ll get crisp, golden potato edges and sweet, caramelized onion ribbons in under an hour. For holiday sides that lean sweeter, consider Maple Sweet Potato Casserole as an alternative to savory roasted potatoes and onions.

Golden roasted potatoes and caramelized onions cooked in a cast iron skillet with fresh rosemary, garlic, parsley, and coarse sea salt.

Why you’ll love this recipe

This recipe is forgiving: swap herbs, adjust spices, or double the batch without breaking a sweat. It’s perfect for busy weeknights, potlucks, or when you need a dependable side to go with roast chicken or a simple steak. Plus, it holds up well—leftovers reheat beautifully and even taste better the next day. For a complete weeknight meal, serve these roasted potatoes and onions alongside Honey Garlic Chicken Bowls.

Ingredients

Serves 4 as a side.

1.5 pounds (about 700 g) baby potatoes or Yukon Gold, halved or quartered so pieces are roughly uniform
1 large yellow or sweet onion, sliced into 1/2-inch (1 cm) wedges
3 tablespoons extra-virgin olive oil
3 cloves garlic, minced
1 teaspoon fresh rosemary, finely chopped (or 1/2 teaspoon dried)
1 teaspoon fresh thyme leaves (or 1/2 teaspoon dried)
1/2 teaspoon smoked paprika (optional, for warmth and color)
Salt and freshly ground black pepper, to taste (about 1 teaspoon salt total)
2 tablespoons chopped fresh parsley, for finishing
Optional: a squeeze of lemon or a drizzle of balsamic vinegar to brighten before serving

How to Make Roasted Potatoes and Onions

Read through the steps first—this roast is fast once the oven is hot. The trick is even sizing, a hot oven, and giving the pan enough room so the potatoes crisp instead of steam.

Step 1: Preheat and prep

Preheat your oven to 425°F (220°C). Line a baking sheet with parchment or use a heavy-duty sheet pan. Toss the halved potatoes and onion wedges in a large bowl with olive oil, minced garlic, rosemary, thyme, smoked paprika, salt, and pepper until everything is evenly coated.

Step 2: Arrange and roast

Spread the potatoes and onions in a single layer on the prepared baking sheet with the potatoes cut-side down—this helps them get a beautiful golden crust. Make sure pieces aren’t crowded; use two pans if needed. Roast for 25 minutes, then flip the potatoes and give the onions a gentle stir.

Step 3: Finish roasting

Return the pan to the oven and roast until the potatoes are tender and the edges are deeply browned, another 15–20 minutes. If you like extra-crisp edges, broil for 1–2 minutes at the end—watch closely to avoid burning.

Step 4: Serve

Remove from the oven and transfer to a serving dish. Sprinkle with chopped parsley and, if using, finish with a light squeeze of lemon or a drizzle of balsamic for contrast. Serve hot.

Golden roasted potato wedges and caramelized onions in a cast iron skillet with fresh rosemary, garlic, thyme, and cracked black pepper.

Tips for the best roasted potatoes and onions

Cut the potatoes into similar-sized pieces so they roast evenly.
Use a hot oven—425°F gives the best balance of tender interior and crisp exterior.
Don’t overcrowd the pan; a crowded pan steams the potatoes and prevents browning.
Swap rosemary and thyme for oregano and basil for a Mediterranean twist, or add a pinch of cayenne for heat.
If you’re in a hurry, parboil potatoes for 5–7 minutes before roasting to shorten oven time and ensure a fluffy interior.
If you want a sweeter variation, try Roasted Sweet Potato Rounds for a different take on roasted tubers.

FAQs

Can I use russet potatoes?

You can, but russets are starchier and can fall apart if over-roasted. Yukon Gold or baby potatoes hold their shape and crisp beautifully.

Can I roast this with other vegetables?

Yes—carrots, parsnips, and bell peppers work well. Add quicker-cooking veggies like zucchini during the last 10–15 minutes so they don’t overcook.

How do I reheat leftovers?

Reheat in a 375°F (190°C) oven for 8–12 minutes to restore crispness, or pan-fry in a skillet with a little oil for a golden finish.

Is this gluten-free?

Yes. This recipe is naturally gluten-free and suits most dietary needs. Just double-check any packaged spices if you have strict sensitivities.

Conclusion

Roasted potatoes and onions are one of those humble dishes that somehow steal the show. They’re easy, flexible, and pair beautifully with everything from weeknight proteins to holiday mains. Once you have this basic method down, you’ll find yourself tweaking it for new flavors—think rosemary and lemon for spring, or smoked paprika and cumin for a hearty autumn profile. Enjoy the simple pleasure of crunchy edges and caramelized sweetness—your family (and your future self) will thank you. These make a great side when paired with a creamy main like Garlic Butter Chicken Pasta.

Happy roasting—don’t be surprised if this becomes your go-to side for everything.