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Roasted Potato Recipe with Onions

Oven roasted potatoes and onions are an easy and classic side dish that everyone loves. Potatoes are always a favorite at our house, and I know these will be a favorite in yours too!

roasted potatoes side dish

You will love Roasting Potatoes in Oven

Roasted potatoes are a great side dish to make and require just minutes to prepare. 

These roasted potatoes with onion are full of flavor and cooked in the oven until they are the perfect texture with crispy edges. 

You simply can’t go wrong with this simple yet so very flavorful dish! 

roasted potatoes

I’m always game for potatoes, and this easy side dish is one of my new favorites!

We have all my favorites in this one – crispy baby potatoes, caramelized fresh onion, and garlic and thyme to really make all the flavors pop. 

Serve these up as a dinner side, and save the leftovers to have as hash with your breakfast! This recipe is classic, delicious, and so easy to make. 

With prep time of only a few minutes, you can sit back and let the oven do the rest of the work for you!

Easy roasted potatoes and onions – delicious side dish! #potatoesandonions #sidedish #potatoes #dinner

Ingredients to make Roasted Potatoes in the Oven

  • Petite red potatoes
  • onion
  • salt
  • thyme
  • garlic powder
  • pepper
  • olive oil
ingredients needed to make oven roasted potatoes

Roasted Potato Recipe substitutions

You can make this recipe with any kind of potatoes. Baby or petite potatoes will need to be halved and any variety will work for this recipe.

You can also use russet potatoes, red potatoes, or any other large potato variety to make roasted potatoes. Just cut the potatoes into small uniform sized pieces so that they will cook evenly and crisp on the edges.

easy roasted potatoes with onions
cutting up red potatoes and onions

How to make Roasted Potatoes in Oven

  1. Preheat: set your oven to 425 degrees.
  2. Prep: Cut the potatoes into halves and dice the onion into chunks.
  3. Mix it up: Add the potatoes, onions, salt, thyme, garlic powder, pepper, and olive oil to a glass casserole baking dish. Use your hands to toss and combine the oil and spices into the potatoes and onions.
  4. Bake: Roast the potatoes and onions for 50-60 minutes, stirring every 20 minutes, until crispy on the edges.
roasted potatoes and onions side dish

How do you make crispy potatoes?

To make your potatoes crispy, you need oil and around 45 minutes to an hour of roasting time. Be sure to use a pan large enough for the potatoes to be spread out in an even layer. This will ensure that each potato has the chance to get those crispy edges!

roasted potatoes and onions in a baking dish

Bake the potatoes and onions at 425 degrees for around an hour, checking to flip and stir every 15 minutes or so. Each time you flip the potatoes, use a spatula to make sure any edges are scraped from the pan. This will help get the potatoes evenly cooked and crispy on more sides. 

How to serve this Roasted Potato Recipe

  • For breakfast: Serve these easy roasted potatoes with eggs and sausage or bacon.
  • For dinner: Roasted potatoes in the oven are a great side dish to serve with your protein of choice and mixed vegetables or a side salad.

How to store Potatoes and Onions

  • Store: store leftover roasted potatoes and onions in an airtight container in the refrigerator for up to 3 days.
  • Reheat: reheat the roasted potatoes in the air fryer or oven for the best texture and crispiness.
easy roasted potatoes with onions

Roasted Potato Recipe FAQs

Do you roast potatoes at high or low temperature?

You should roast potatoes at a high temperature for best results. The high oven temperature helps get those delicious crispy edges on the roasted potatoes that make them so flavorful.

Why aren’t my roasted potatoes crispy?

Size: if your potato pieces are too large, they will not be able to get crispy. Cut your potatoes into small uniform chunks before roasting them in the oven.
Oven temperature: a high heat is necessary for getting potatoes to have that crispy texture. If your oven is not hot enough your potatoes will not get crispy.
Pan: Make sure your baking dish is large enough that your potatoes can sit in an even layer. This will help ensure they cook properly and are not over crowded.

More Potato Recipes we love

Easy potato side dish – I love making this for dinner! #potatoesandonions #sidedish #potatoes #dinner

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easy roasted potatoes with onions

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Potatoes and Onions Recipe

easy roasted potatoes with onions

Onions and Roasted Potatoes (Oven Recipe)

Yield: 4 - 6 servings
Prep Time: 10 minutes
Cook Time: 1 hour
Total Time: 1 hour 10 minutes

Easy and delicious roasted potatoes and onions recipe

Ingredients

  • 1 lb. petite red potatoes, halved (see notes)
  • 1 onion, diced into chunks
  • 1 teaspoon salt
  • 2 teaspoon thyme
  • 2 teaspoons garlic powder
  • 1 teaspoon pepper
  • up to ¼ cup olive oil

Instructions

  1. Preheat the oven to 425 degrees
  2. Cut the baby potatoes into halves and dice the onion into chunks
  3. Add the potatoes, onions, salt, thyme, garlic powder, and pepper to a glass casserole dish
  4. Pour on the olive oil to coat (I used the full ¼ cup)
  5. Use your hands to toss and combine the oil and spices into the potatoes
    and onions.
  6. Roast the potatoes and onions for 50-60 minutes, stirring every 15 - 20 minutes,
    until crispy on the edges.

Notes

My potatoes were very small, so I just halved them. If yours are a bit larger, you may want to quarter them to get smaller pieces (these crisp up better)

Nutrition Information:
Yield: 5 Serving Size: 1
Amount Per Serving: Calories: 182Total Fat: 11gSaturated Fat: 2gTrans Fat: 0gUnsaturated Fat: 9gCholesterol: 0mgSodium: 435mgCarbohydrates: 19gFiber: 2gSugar: 1gProtein: 2g

Did you make this recipe?

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Marta

Thursday 30th of November 2023

Had a bunch of potatoes & onions to use up ASAP & this turned out yummy! Thank you!

Joy Shull

Saturday 2nd of December 2023

So glad you enjoyed it!

Martha

Monday 21st of February 2022

They were a hit! Next time I will use garlic cloves, not that there was anything wrong with the recipe as it is. We’re just a family of garlic lovers!

Michele

Saturday 5th of February 2022

Do you have to use a glass dish

Joy Shull

Tuesday 1st of March 2022

You can also use a nonstick baking sheet.

Jessica

Wednesday 27th of October 2021

Can u use vegetable oil

Joy Shull

Saturday 6th of November 2021

yes

Joyce St Onge

Wednesday 3rd of March 2021

I made these a couple of weeks ago and they were an instant hit with my husband. He requested them for dinner again tonight and the only change he requested was for double the onions! I think we have a hit here.

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