Caramelized Onion and Potato Medley

Perfectly Crispy Oven Roasted Potatoes and Onions: Your Go-To Easy Side Dish Recipe

Oven-roasted Potatoes and Onions are a timeless, effortless, and universally loved side dish. The simple combination of tender potatoes and caramelized onions, perfectly seasoned and roasted to golden perfection, makes this recipe an undeniable hit. If potatoes are a staple in your home, this easy and incredibly flavorful preparation is sure to become a new family favorite!

Delicious oven-roasted potatoes and onions side dish, golden and crispy.

Roasted Potatoes and Onions: The Ultimate Easy Side Dish

In the realm of side dishes, roasted potatoes reign supreme for their incredible flavor and minimal preparation time. This particular recipe for roasted potatoes with onion elevates the classic, infusing every bite with savory goodness. Cooked to perfection in the oven, these potatoes boast an irresistible texture – beautifully crispy edges giving way to a fluffy, tender interior. The onions caramelize alongside, adding a subtle sweetness and depth that complements the earthy potatoes perfectly.

What makes this dish truly special is its hands-off approach. After just a few minutes of quick prep, you can simply pop it in the oven and let the magic happen. The high heat of the oven transforms humble ingredients into a spectacular accompaniment for almost any meal. Whether you serve them as a hearty side for dinner or repurpose the leftovers into a delicious breakfast hash, these roasted potatoes and onions are a versatile addition to your culinary repertoire. It’s a truly classic, utterly delicious, and remarkably simple recipe that delivers gourmet results with everyday ease.

Close-up of golden brown roasted potatoes, fresh out of the oven.

Beyond being a simple side, this dish offers incredible flexibility. It pairs beautifully with roasted chicken, grilled fish, steak, or even as a base for a vegetarian meal. The natural sweetness of the caramelized onions, combined with the savory spices, creates a flavor profile that is both comforting and sophisticated. The best part? The minimal fuss means you spend less time in the kitchen and more time enjoying delicious, home-cooked food. This recipe is perfect for busy weeknights, holiday gatherings, or simply whenever you crave a hearty and satisfying potato dish.

Easy roasted potatoes and onions: a delicious and versatile side dish for any meal.

Simple Ingredients for Flavorful Roasted Potatoes and Onions

Creating this delightful side dish requires just a handful of common ingredients, making it accessible for any home cook. Each component plays a crucial role in developing the rich flavors and perfect textures:

  • Petite Red Potatoes: These small, waxy potatoes hold their shape well and develop a creamy interior with crispy skin when roasted. Their thin skins mean no peeling is required, saving you precious prep time.
  • Onion: A single medium-sized onion, diced into chunks, softens and sweetens beautifully in the oven, imparting a lovely aromatic foundation to the dish. Yellow or sweet onions work best here.
  • Salt: Essential for seasoning, salt enhances all the other flavors and helps draw out moisture, contributing to crispiness.
  • Thyme: This aromatic herb adds a subtle, earthy, and slightly floral note that perfectly complements potatoes and onions. Both fresh and dried thyme work wonderfully.
  • Garlic Powder: For an instant boost of savory, pungent garlic flavor without the risk of burning fresh garlic cloves at high temperatures.
  • Pepper: Freshly ground black pepper adds a hint of warmth and balances the overall seasoning profile.
  • Olive Oil: The key to achieving those coveted crispy edges! Olive oil not only conducts heat efficiently but also adds a fruity, rich flavor to the vegetables. Use enough to generously coat everything.
A selection of fresh ingredients laid out, including petite red potatoes, a whole onion, olive oil, and various spices for roasting.

Versatile Substitutions and Flavor Variations

While this recipe is perfect as is, it’s also incredibly forgiving and adaptable. Don’t be afraid to experiment with different ingredients to suit your taste or what you have on hand.

Potato Varieties

You can certainly make this recipe with almost any kind of potato. While petite red potatoes are recommended for their ideal texture and ease of preparation (no peeling!), other varieties work wonderfully too:

  • Russet Potatoes: These starchy potatoes will become incredibly fluffy on the inside with a very crispy exterior. They absorb flavors beautifully. Be sure to peel them and cut them into 1-inch chunks for even cooking.
  • Yukon Gold Potatoes: Known for their buttery flavor and creamy texture, Yukon Golds are a fantastic choice. They don’t need to be peeled, and cutting them into uniform 1-inch pieces will yield excellent results.
  • Fingerling Potatoes: These long, slender potatoes are naturally tender and flavorful. Halve or quarter them lengthwise depending on their size to ensure even cooking and maximum surface area for crisping.
  • Sweet Potatoes: For a slightly sweeter and more vibrant side dish, substitute with sweet potatoes. Cut them into 1-inch cubes. The cooking time might vary slightly, so keep an eye on them.

The key to success with any potato variety is to cut them into small, uniform-sized pieces. This ensures that they cook evenly throughout the baking time, leading to consistent crispiness on the edges and tenderness in the middle. Uneven pieces will result in some being undercooked and others overcooked.

Onion Variations

Feel free to use different types of onions to change the flavor profile:

  • Red Onion: Adds a slightly sharper, more pungent flavor and a beautiful purple hue to the dish.
  • Sweet Onion (e.g., Vidalia, Walla Walla): Will caramelize even more sweetly, creating a milder, sweeter roasted flavor.
  • Shallots: For a more delicate, refined onion flavor, substitute with a few shallots, halved or quartered.

Spice and Herb Alternatives

Customize the seasonings to your liking:

  • Rosemary: Fresh or dried rosemary sprigs pair exceptionally well with potatoes and can be added along with or in place of thyme.
  • Paprika or Smoked Paprika: Adds a touch of color and a mild, sweet, or smoky flavor.
  • Onion Powder: If you love onion flavor, a dash of onion powder can enhance it further, especially if using a milder onion variety.
  • Italian Seasoning: A blend of herbs like oregano, basil, and marjoram can give the dish a Mediterranean twist.
  • Cayenne Pepper or Red Pepper Flakes: For those who enjoy a little heat, a pinch of cayenne or red pepper flakes can kick things up a notch.
Close-up of roasted potatoes and onions, glistening with olive oil and spices, perfectly browned.
Hands cutting red potatoes and onions on a wooden cutting board, preparing them for roasting.

How to Make Perfectly Roasted Potatoes and Onions

Achieving perfectly crispy and flavorful roasted potatoes and onions is incredibly simple when you follow these easy steps. The key is to prepare them correctly and let the hot oven do its work.

  1. Preheat Your Oven: Start by setting your oven to a high temperature of 425 degrees Fahrenheit (220 degrees Celsius). A hot oven is crucial for creating that desirable crispy exterior and ensuring even cooking without the potatoes becoming soggy. Don’t skip this step – patience in preheating pays off!
  2. Prepare Your Vegetables: Thoroughly wash your potatoes. If using petite red potatoes, simply halve them. For larger potato varieties like Russets or Yukon Golds, cut them into uniform 1-inch (2.5 cm) chunks. This consistency in size is vital for even cooking. Next, dice your onion into similar 1-inch chunks.
  3. Season and Coat: In a large glass casserole baking dish (or, ideally, a large, rimmed baking sheet for maximum crispiness – see tip below), combine the prepped potatoes and onions. Sprinkle them generously with salt, thyme, garlic powder, and pepper. Drizzle with 1/4 cup of olive oil, or enough to ensure every piece is lightly coated. Using your hands is often the most effective way to toss and combine the oil and spices, ensuring that each potato and onion piece gets its fair share of flavor.
  4. Roast to Perfection: Place the dish or baking sheet into your preheated oven. Roast the potatoes and onions for 50-60 minutes. It’s important to check and stir them every 20 minutes (or every 15 minutes if using a single layer on a baking sheet). Stirring prevents sticking, promotes even browning, and helps all sides of the vegetables get crispy. Continue roasting until the potatoes are fork-tender on the inside and beautifully golden brown and crispy on the edges.

Pro Tip for Extra Crispiness: For the absolute best crispy results, arrange your seasoned potatoes and onions in a single layer on a large, rimmed baking sheet. Avoid overcrowding the pan, as this steams the vegetables instead of roasting them, preventing crispiness. If you have too many vegetables, use two baking sheets and rotate them halfway through cooking.

Red potatoes, onions, olive oil, and spices mixed in a glass baking dish, ready for roasting.
Roasted potatoes and onions browning in a baking dish, halfway through cooking.
A vibrant side dish of golden roasted potatoes and caramelized onions, ready to serve.

How to Achieve Perfectly Crispy Roasted Potatoes

The secret to achieving irresistibly crispy roasted potatoes lies in a few key techniques:

  1. High Heat is Essential: Always preheat your oven to a high temperature, typically 400-450°F (200-230°C). This high heat quickly crisps the exterior of the potatoes.
  2. Ample Oil: Don’t skimp on the olive oil. It helps conduct heat and creates that golden, crunchy crust. Ensure every piece of potato is lightly coated.
  3. Single Layer for Roasting: The most crucial step! Spread the potatoes out into a single, even layer on a large baking sheet. Do not overcrowd the pan. If the potatoes are piled on top of each other, they will steam instead of roast, resulting in soggy, not crispy, potatoes. Use two baking sheets if necessary.
  4. Stirring for Even Browning: Stirring or flipping the potatoes every 15-20 minutes during roasting ensures that multiple sides get direct contact with the hot pan and oven air, leading to even crispiness. When you stir, use a sturdy spatula to gently scrape any browned bits that may be sticking to the pan, incorporating them back into the potatoes for more flavor and texture.
  5. Dry Potatoes: For even better crispiness, ensure your potatoes are as dry as possible after washing and cutting. Pat them thoroughly with paper towels before tossing with oil and spices. Excess moisture creates steam, which prevents browning.
  6. Consider Par-boiling (Optional): For next-level crispiness, some chefs recommend par-boiling the cut potatoes for 5-7 minutes before roasting. Drain them well and let them steam dry for a few minutes, then rough up their edges by shaking them in a colander. This creates more surface area for crisping. However, for this easy recipe, simply drying them thoroughly is usually sufficient.
Roasted potatoes and onions, glistening and perfectly browned, in a white baking dish.

Storing and Reheating Your Roasted Potatoes and Onions

Proper storage and reheating can ensure your delicious roasted potatoes and onions remain enjoyable even after the first meal.

  • Storing Leftovers: Any leftover roasted potatoes and onions should be cooled completely before storing. Once cool, transfer them to an airtight container and place them in the refrigerator. They will maintain their quality and flavor for up to 3 days.
  • Reheating for Best Texture: To bring back their wonderful crispiness, reheating in an air fryer or the oven is highly recommended.
    • Air Fryer: Preheat your air fryer to 375°F (190°C). Arrange the leftover potatoes and onions in a single layer in the air fryer basket. Cook for 5-8 minutes, shaking the basket halfway through, until they are heated through and crispy.
    • Oven: Preheat your oven to 375°F (190°C). Spread the leftovers on a baking sheet in a single layer. Reheat for 10-15 minutes, or until warmed through and the edges have re-crisped.

    While you can reheat them in the microwave for speed, be aware that they will likely lose their crisp texture and become softer. The air fryer or oven methods are superior for maintaining that desirable crunch.

A serving of easy roasted potatoes with onions, ready to be enjoyed.

More Delicious Potato & Roasted Vegetable Recipes

If you love this simple roasted potatoes and onions recipe, you’ll be thrilled to discover more ways to enjoy potatoes and other delicious roasted vegetables. Explore these recipes for more culinary inspiration:

  • Rosemary Roasted Potatoes
  • Roasted Broccoli and Carrots
  • Roasted Baby Red Potatoes
  • Garlic Parmesan Roasted Potatoes
  • Famous Crispy Potato Casserole
  • Sweet Potato Hash
  • Garlic Parmesan Potato Wedges
A bowl of easy roasted potatoes with onions, garnished and ready to serve.
easy roasted potatoes with onions















4.52 from 149 votes

Roasted Potatoes and Onions

By: Joy Shull
This simple potato side dish recipe pairs well with just about anything!
Prep: 10 minutes
Cook: 1 hour
Total: 1 hour 10 minutes
Servings: 4

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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
  • 1/4 cup olive oil, or enough to coat

Instructions

  • Preheat the oven to 425 degrees Fahrenheit (220°C). This high heat is essential for achieving crispy potatoes.
  • Wash and dry the baby potatoes. Cut them into halves. Dice the onion into roughly 1-inch chunks, ensuring uniform size for even cooking.
  • In a large glass casserole dish or on a large, rimmed baking sheet, combine the potatoes and onions.
  • Sprinkle with salt, thyme, garlic powder, and pepper. Pour on the olive oil to generously coat all the vegetables. (We used the full 1/4 cup for optimal crisping).
  • Use your hands to thoroughly toss and combine the oil and spices into the potatoes and onions, ensuring every piece is well-coated for maximum flavor and crispiness.
  • Roast the potatoes and onions for 50-60 minutes, stirring every 15-20 minutes, until they are tender on the inside, golden brown, and delightfully crispy on the edges.

Video

Notes

My potatoes were very small, so I just halved them. If your potatoes are larger, you may want to quarter them or cut them into 1-inch pieces to ensure they cook evenly and crisp up nicely. Consistency in size is key for perfect roasting!

Nutrition

Calories: 217kcal, Carbohydrates: 22g, Protein: 3g, Fat: 14g, Saturated Fat: 2g, Polyunsaturated Fat: 2g, Monounsaturated Fat: 10g, Sodium: 604mg, Potassium: 587mg, Fiber: 3g, Sugar: 3g, Vitamin A: 59IU, Vitamin C: 13mg, Calcium: 26mg, Iron: 1mg



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