Roasted Potatoes And Onions

The smell of onions slowly surrendering their sweetness on a hot baking sheet is enough to make anyone drift toward the kitchen with a curious fork. My friend Marta once called this dish potato jewelry because the golden edges and glossy caramelized wedges look almost too pretty to eat. It is the simplest thing I know how to make well, and yet every single time I pull the pan from the oven I feel like I have pulled off something special.

I started making this on rainy Sunday evenings when cooking anything complicated felt like too much, and it quickly became the dish my roommate would request by name the moment clouds rolled in.

Ingredients

• 2 lbs Yukon Gold or red potatoes, scrubbed and cut into 1 inch cubes: Yukon Golds develop the best crisp shell while staying fluffy inside, and their thin skin means no peeling required.
• 2 large yellow onions, peeled and cut into thick wedges: Thick wedges hold their shape and turn sweet instead of burning to a crisp too quickly.
• 3 tbsp olive oil: Coat every surface generously because this is your only source of fat and flavor carrier.
• 1 1/2 tsp kosher salt: Potatoes need more salt than you think, and kosher salt distributes evenly without clumping.
• 1/2 tsp freshly ground black pepper: Freshly cracked pepper adds a gentle warmth that pre ground simply cannot match.
• 1 tsp dried thyme or rosemary: Thyme brings an earthy calm while rosemary goes bold and piney, so choose based on your mood.
• 2 cloves garlic, minced (optional): Garlic is optional here but I always add it because the roasted bits turn into tiny golden flavor bombs.
• 2 tbsp fresh parsley, chopped (optional): A handful of parsley at the end brightens everything and adds a fresh contrast to the deep roasted flavors.

Instructions

Get the oven screaming hot:

Preheat your oven to 425 degrees F and line a large baking sheet with parchment paper so nothing sticks and cleanup is effortless.

Toss everything together:

Pile the potato cubes and onion wedges into a large bowl, pour on the olive oil, sprinkle the salt, pepper, dried herb, and garlic, then use your hands to massage every piece until evenly coated.

Spread in a single layer:

Arrange the vegetables on the baking sheet with space between each piece because crowding is the enemy of crispiness and they need room to breathe and brown properly.

Roast and flip halfway:

Slide the pan into the oven and roast for 35 to 40 minutes, flipping everything once at the 20 minute mark so each side gets its turn facing the heat.

Finish and serve:

Scatter fresh parsley over the top while everything is still hot so the fragrance blooms, then serve immediately while the edges are at their crunchiest.

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There was a night last winter when the power went out and I finished roasting these by flashlight, eating them straight off the pan while sitting on the kitchen floor with my partner, and somehow they tasted better than any fancy dinner I have ever made.

What to Serve Alongside

These potatoes are magnificent next to a simply roasted chicken thigh or a piece of grilled salmon where their sweetness balances the savory meat. For a fully vegetarian spread I pile them onto a plate with a bitter greens salad dressed in lemon and good olive oil, and maybe a soft dollop of yogurt on the side. They also disappear fast at barbecues alongside burgers or grilled sausages.

Herb and Spice Variations

Thyme and rosemary are my defaults but smoked paprika transforms this dish into something deeply savory with a campfire edge. A pinch of cumin and coriander takes it in a warmer, more aromatic direction that pairs beautifully with grilled meats. You can also toss in a handful of whole unpeeled garlic cloves to roast alongside the potatoes for a mellower, sweeter garlic flavor.

Getting the Texture Right

The difference between good roasted potatoes and unforgettable ones comes down to two things: dry surfaces and high heat. Pat the soaked potatoes thoroughly with a clean towel before oiling them. Make sure your oven is fully preheated before the pan goes in. Flip only once and do it confidently with a thin spatula so you do not break the forming crust.

• Cut all potato cubes the same size so they finish cooking at the same time.
• Taste a potato before removing the pan from the oven because underdone centers are disappointing.
• Let the finished potatoes rest for two minutes on the pan before serving so the crust sets.

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Some recipes earn their place in your kitchen not by being impressive but by being reliably wonderful every single time you need them, and this is exactly that kind of recipe.

Your Questions Answered

→ What type of potatoes work best for roasting?

Yukon Gold and red potatoes excel in roasting due to their naturally creamy texture and medium starch content. These varieties hold their shape during cooking while developing crispy exteriors. Russet potatoes also work well but may become fluffier. Avoid waxy potatoes like fingerlings, as they won't achieve the same crispiness.

→ Should I cut potatoes and onions the same size?

Potatoes should be cut into uniform 1-inch cubes for even cooking, while onions work best in thick wedges rather than diced pieces. The larger onion pieces withstand the roasting time without burning, allowing them to caramelize beautifully while potatoes become tender and golden.

→ How do I get the crispiest roasted potatoes?

For extra crispy results, soak cut potatoes in cold water for 30 minutes to remove excess starch, then drain and pat completely dry before tossing with oil. Arrange vegetables in a single layer without overcrowding the pan, and flip halfway through cooking. Preheating the baking sheet can also enhance initial crisping.

→ Can I use fresh herbs instead of dried?

Fresh herbs work wonderfully and add brighter flavor. Use three times the amount when substituting fresh for dried—about 1 tablespoon of fresh thyme or rosemary. Add delicate fresh herbs like parsley or chives after roasting as a garnish, while sturdy herbs like rosemary can go in at the start.

→ What temperature is ideal for roasting potatoes and onions?

425°F (220°C) creates the perfect balance between crispy exteriors and tender interiors. This high heat encourages browning and caramelization while cooking the vegetables through. Lower temperatures may result in softer textures without the desired golden crunch.

→ Can I prepare this dish ahead of time?

Potatoes and onions can be cut and stored separately in the refrigerator up to 24 hours before cooking. Keep cut potatoes submerged in cold water to prevent browning, then drain and dry thoroughly before roasting. For best results, roast just before serving to maintain optimal texture.