Caramelized Onion Mashed Potatoes Recipe

Caramelized Onion Mashed Potatoes Recipe

Cook Time: 45 minutes

Ingredients

This recipe yields 8 servings. Ingredient amounts can be adjusted proportionally, but cooking times remain the same. Note that scaling may not be perfect for all recipes.

For the Caramelized Onions

  • 2 tablespoons unsalted butter
  • 2 large onions, thinly sliced
  • 1/4 cup beef broth
  • 2 teaspoons salt
  • 1/2 teaspoon freshly ground black pepper

For the Mashed Potatoes

  • 6 large russet potatoes, peeled and quartered
  • 1/2 cup unsalted butter
  • 1 cup whole milk
  • Salt and freshly ground black pepper to taste

Directions

Caramelized Onions

  1. In a large skillet over medium-low heat, melt the butter with a splash of olive oil.
  2. Add the sliced onions, beef broth, salt, and pepper. Cook gently, stirring occasionally, until the onions turn a rich golden brown, about 20 to 25 minutes.
  3. Remove from heat and set aside while you prepare the potatoes.

Mashed Potatoes

  1. Place the potatoes in a large pot and cover with cold, salted water, about an inch above the potatoes. Bring to a boil and cook until fork-tender, approximately 20 minutes.
  2. Drain the potatoes and return them to the pot. Dry over medium-high heat for about 30 seconds to remove excess moisture.
  3. In a small saucepan, heat the butter and milk together over medium heat until the butter melts.
  4. Coarsely mash the potatoes, then stir in the warm butter and milk mixture until smooth and fluffy.
  5. Season with salt and freshly ground black pepper to taste.
  6. Top the mashed potatoes with the caramelized onions before serving.

Nutrition Facts (per serving)

  • Calories: 378
  • Total Fat: 16g (20% DV)
  • Saturated Fat: 10g (48% DV)
  • Cholesterol: 41mg (14% DV)
  • Sodium: 641mg (28% DV)
  • Total Carbohydrates: 53g (19% DV)
  • Dietary Fiber: 6g (20% DV)
  • Total Sugars: 5g
  • Protein: 8g (15% DV)
  • Vitamin C: 20mg (23% DV)
  • Calcium: 88mg (7% DV)
  • Iron: 3mg (14% DV)
  • Potassium: 1337mg (28% DV)

* Percent Daily Values are based on a 2,000 calorie diet. Your daily values may vary depending on your caloric needs. Consult a healthcare professional if you are following a restrictive diet.

The Rich History of Caramelized Onion Mashed Potatoes

Mashed potatoes have been a staple of European cuisine for centuries, with origins tracing back to 17th-century France and England, where potatoes were gradually embraced as a nutritious and versatile food. The addition of caramelized onions elevates this humble dish, creating a blend of sweet and savory flavors that reflect centuries of culinary experimentation. Slowly cooking onions until they turn golden brown transforms their natural sugars, a technique cherished in French cuisine known as mirepoix enhancement, which has influenced modern comfort foods worldwide.

Regional Variations

While mashed potatoes are ubiquitous in American and European kitchens, the caramelized onion version showcases regional twists. In the American South, caramelized onions are often cooked with a hint of brown sugar or bourbon for extra depth. Northern European versions may include butter and cream in larger quantities to create an exceptionally rich, velvety texture. Each region adapts the recipe slightly based on local produce and culinary traditions, but the core idea of enhancing potatoes with sweet, savory onions remains universal.

Distinctive Features Compared to Similar Dishes

Unlike standard mashed potatoes, which rely mainly on butter and milk for flavor, caramelized onion mashed potatoes introduce layers of complexity through slow-cooked onions. They differ from potato gratins or scalloped potatoes, which use baking and cheese to create texture, as this dish focuses on a creamy, smooth consistency with a naturally sweet, aromatic topping. The caramelization process provides a subtle umami note that sets it apart from plain mashed or whipped potatoes.

Typical Serving Occasions

This dish is commonly served as a side during festive meals, holiday dinners, and upscale family gatherings. It pairs particularly well with roasted meats, grilled steaks, or hearty vegetarian mains. Due to its rich flavor profile, it often appears on menus at bistros and contemporary American restaurants, adding a gourmet touch to traditional comfort food. Home cooks also favor it for potlucks and special dinners where a familiar yet elevated side is desired.

Interesting Facts

  • Caramelized onions take patience: achieving a deep golden-brown color can take 3045 minutes, which is longer than many expect.
  • Onions naturally contain sugars that intensify when cooked slowly, creating a flavor profile that complements the creamy potatoes perfectly.
  • The dish is versatile: leftover caramelized onions can enhance soups, sandwiches, and other potato dishes.
  • Mashed potatoes with caramelized onions have gained popularity in American gastropubs and fine dining, reflecting a trend of elevating traditional comfort foods.
  • This combination highlights a culinary principle: simple ingredients prepared thoughtfully can create a complex, memorable taste.

FAQ about Caramelized Onion Mashed Potatoes Recipe

Leftover caramelized onion mashed potatoes can be stored in an airtight container in the refrigerator for up to 3-4 days. To reheat, microwave or warm them in a pot over low heat, adding a bit of milk or butter to restore their creaminess.

Yes, you can freeze mashed potatoes with caramelized onions. Allow them to cool completely before transferring to a freezer-safe container or bag. They can be frozen for up to 2-3 months. When ready to eat, thaw them in the fridge overnight and reheat on the stovetop or microwave.

Yes, you can prepare the caramelized onions in advance. Once cooked, let them cool and store in an airtight container in the refrigerator for up to 3-4 days. You can also freeze them for longer storage, up to 2 months.

To make this recipe vegetarian, substitute the beef broth with vegetable broth or water. The caramelized onions will still provide a rich flavor.

Caramelized onion mashed potatoes pair wonderfully with roasted meats, grilled steaks, barbecued dishes, or even vegetarian options like grilled vegetables or a hearty salad. They're also a great side dish for holidays like Thanksgiving or Christmas.

While russet potatoes are ideal for mashed potatoes due to their fluffy texture, you can use Yukon Gold potatoes for a creamier, buttery consistency. Red potatoes or other waxy varieties may result in a denser mash.

Caramelizing onions typically takes about 20-25 minutes over medium-low heat. However, this can vary depending on your stove and the type of pan you use. Some people prefer to cook them even longer for a richer, deeper flavor.

The butter provides richness and helps the onions brown, while the beef broth adds a savory depth of flavor. If you're looking for a lighter version, you can reduce the amount of butter and use vegetable broth or water instead of beef broth for a milder taste.

While it's possible to use pre-made mashed potatoes, homemade mashed potatoes will offer a much fresher taste and better texture. If you're in a hurry, look for high-quality refrigerated or frozen mashed potatoes, but be sure to season them with salt and pepper to your liking before adding the caramelized onions.

Comments

Lela

06/19/2025 12:42:08 AM

I loved this recipe. I am not usually a fan of cooked onions, but these were so good. I think the onions added so much to mashed potatoes. I will make them again.

MaryLou

06/16/2025 01:32:43 AM

Honestly, mashed potatoes aren't my favorite, but I do like them. The caramelized onions really peaked my interest. I thought they were pretty good. The caramelized onions added a nice depth of flavor. It was a perfect side for our BBQ. My only critique is that you have to use 3 pots/pans for this recipe. Otherwise, we would make it again.

Christina

06/13/2025 02:50:53 AM

ABSOLUTELY FANTASTIC!! My only critique is that the onions took way longer than specified (more like an hour for me), but other than that this recipe was perfect in every way! The family LOVED it and I will absolutely be making these often.

Paula

06/12/2025 09:01:17 PM

I followed the recipe exactly for the caramelized onions except for cutting it in half for just my husband and me. They had such depth of flavor and really added to the mashed potatoes. I can’t wait to fix these for hamburgers and hotdogs.

Melissa Hernandez

04/25/2025 10:57:26 PM

Made it on a whim — huge success.