Roasted Potatoes and Onions

The smell of onions caramelizing in a hot oven is one of those things that pulls everyone into the kitchen before dinner is even close to ready.

I started making this on busy weeknights when I wanted something warm and satisfying but could not stand over the stove.

Ingredients

• Yukon Gold or red potatoes (2 lbs, 900 g): These varieties hold their shape while developing a beautiful golden crust.
• Yellow onions (2 large): Thick wedges transform into sweet jammy bites in the oven.
• Olive oil (3 tbsp): Good olive oil is the foundation of crispiness here so do not skimp.
• Kosher salt (1 1/2 tsp): Coarse salt draws out moisture and seasons evenly.
• Black pepper (1/2 tsp): Freshly ground makes a noticeable difference.
• Dried thyme or rosemary (1 tsp): Either herb works beautifully and you can switch based on your mood.
• Garlic, minced (2 cloves, optional): Adds a savory depth that pairs perfectly with the onions.
• Fresh parsley, chopped (2 tbsp, optional): A bright finish that balances the rich roasted flavors.

Instructions

Preheat and prepare:

Set your oven to 425F (220C) and line a large baking sheet with parchment paper so nothing sticks.

Season the vegetables:

Toss the cubed potatoes and onion wedges in a large bowl with olive oil, salt, pepper, your chosen herb, and garlic until everything is well coated.

Spread them out:

Arrange the mixture on the baking sheet in a single layer giving each piece space to breathe and crisp up rather than steam.

Roast until golden:

Cook for 35 to 40 minutes flipping everything halfway through until the potatoes have a deep golden crust and the onions are soft and caramelized.

Finish and serve:

Scatter fresh parsley over the top and serve warm while the edges are still crackling.

Save

This dish became my go to contribution to every potluck after a friend asked for the recipe before she even finished her plate.

What to Serve Alongside

These roasted potatoes and onions are incredibly versatile and pair well with almost anything you are cooking.

Making It Your Own

Sometimes I toss in smoked paprika for a deeper flavor or swap the herbs depending on what is wilting in my fridge.

A Few Last Thoughts

Simple food like this is a reminder that you do not need complicated techniques to make something people remember.

• Check the potatoes at the 30 minute mark because oven temperatures vary.
• A squeeze of lemon juice at the end wakes up all the flavors beautifully.
• Leftovers reheat wonderfully in a skillet the next morning with an egg on top.

Save

Roasted potatoes and onions are proof that the humblest ingredients often make the most satisfying meals.

Common Recipe Questions

→ How do I make the potatoes extra crispy?

Soak cut potatoes in cold water for 30 minutes before roasting to remove excess starch. Drain thoroughly and pat completely dry with towels before tossing with oil and seasonings. This step creates a crunchier exterior.

→ What herbs work best with this combination?

Dried thyme and rosemary are excellent choices, but fresh herbs work wonderfully too. Try sage, oregano, or Italian seasoning blends. Add herbs during tossing so they coat evenly and infuse flavors throughout roasting.

→ Can I prepare this ahead of time?

Cut the vegetables up to a day in advance and store in the refrigerator in separate containers. Pat potatoes dry before cooking. The dish reheats well at 375°F (190°C) for 10-15 minutes until warmed through.

→ What other vegetables can I add?

Bell peppers, carrots, parsnips, or Brussels sprouts complement the flavors beautifully. Add vegetables with similar cooking times, or put harder vegetables in first and softer ones halfway through to ensure even roasting.

→ Why do my onions burn instead of caramelize?

Onions caramelize best when cut into thick wedges rather than thin slices. Thick pieces withstand the high heat while developing sweetness. Also ensure vegetables are spread in a single layer without overcrowding the pan.