Potato Casserole with Caramelized Onions

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This Potato Casserole with Caramelized Onions is a great side dish recipe for a special meal!

Potato Casserole with Caramelized Onions

Caramelized onions are baked into a creamy potato mixture in this potato casserole. If you’ve eaten caramelized onions before, then you know that they are sweet and delicious and add so much flavor to recipes. They’re very easy to make. This is an amazing potato side dish!

Potato Casserole with Caramelized Onions

How to make caramelized onions:

Make sure you buy sweet onions (such as Vidalia or Maui). You’ll slice the onions thinly in preparation for caramelizing.

In a large skillet, you’ll melt 1/4 cup (1/2 stick) butter over medium heat. Then you’ll add some olive oil, the onions and a small amount of sugar. Cook the onions, stirring often, 25 to 30 minutes or until the onions are deep golden brown. At this point, they will be sweet and caramelized. Remove the pan from heat and set aside while you prepare the potatoes.

Potato Casserole with Caramelized Onions

How to make this Potato Casserole with Caramelized Onions:

Scroll to the end of this post to print out the complete recipe. Peeled and cubed baking potatoes are cooked in chicken broth. The hot, cooked potatoes are mashed with butter and then combined with whipping cream, sour cream, eggs and salt.

Half of the potato mixture is placed into a casserole dish and then topped with the caramelized onions. The rest of the potato mixture is spooned on top of the caramelized onions. The casserole is baked for about 30 minutes until it’s golden and toasty on top.

Potato Casserole with Caramelized Onions served with chicken

What to serve with potato casserole:

This is a great side dish casserole to serve with a main dish protein. Roasted Chicken, Cider Ham or Roasted Beef Tenderloin are all good main dish choices to serve with this Potato Casserole with Caramelized Onions. What a great Sunday night dinner! 

Potato Casserole served with chicken

Make ahead instructions:

This potato casserole may be prepared one day ahead. Cover it and refrigerate overnight. Remove the casserole from the refrigerator 30 minutes before baking. Bake at 350 degrees F. for 40 to 45 minutes or until golden brown.

Here are a few more potato recipes you might like to try:

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Potato Casserole with Caramelized Onions

The most delicious baked potato casserole with plenty of caramelized onions!
Prep Time 45 minutes
Cook Time 1 hour 20 minutes
Servings 12 servings
Calories 444kcal
Course Side Dish
Cuisine American
Keyword caramelized onions, potato casserole

Ingredients

  • 3/4 cup (1½ sticks) butter, divided
  • 1/4 cup olive oil
  • 6 large sweet onions, sliced thinly
  • 1 tablespoon granulated white sugar
  • 4 pounds baking potatoes, peeled and cubed
  • 4 cups chicken broth
  • 1 cup whipping cream
  • 1 cup sour cream
  • 4 large eggs, beaten
  • 1/2 teaspoon salt

Instructions

  • Melt 1/4 cup (1/2 stick) of the butter in a large skillet over medium heat. Add the olive oil, onions and sugar. Cook, stirring often, 25 to 30 minutes or until the onions are deep golden brown. Remove from heat, and set aside.
  • Preheat the oven to 350 degrees F. Spray a 9x13-inch casserole dish with nonstick spray.
  • Bring the potatoes and chicken broth to a boil in a Dutch oven; cook 20 minutes or until tender. Drain. Reserve the broth for another use, if desired.
  • Add the remaining 1/2 cup (1 stick) of butter to the potatoes; mash with a potato masher until smooth. In a medium bowl, whisk together the whipping cream and remaining ingredients; add to the potato mixture, stirring until blended.
  • Spoon 1/2 of the potato mixture into the prepared baking dish. Spoon the caramelized onions evenly over the potatoes. Spoon the remaining potatoes evenly over the onions.
  • Bake for 30 to 35 minutes or until golden.

Notes

  • *MAKE AHEAD: The casserole may be prepared a day ahead and refrigerated overnight. Remove from refrigerator 30 minutes before baking. Bake at 350 degrees F. for 40 to 45 minutes or until golden brown.
  • *If you are preparing this recipe as gluten-free, just be sure to use a brand of chicken broth that is GF.

Nutrition

Serving: 1serving | Calories: 444kcal | Carbohydrates: 43g | Protein: 8g | Fat: 28g | Saturated Fat: 14g | Cholesterol: 135mg | Sodium: 554mg | Potassium: 975mg | Fiber: 3g | Sugar: 10g | Vitamin A: 811IU | Vitamin C: 22mg | Calcium: 111mg | Iron: 2mg
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