Caramelized Onion Mashed Potatoes

A twist on a classic, these caramelized onion mashed potatoes are a decadent side dish that everyone will love! Creamy mashed potatoes combined with rich and buttery caramelized onions, this flavorful mashed potatoes recipe is perfect for the holidays or just for dinner!

Course Side Dish

Cuisine American

Prep Time 10

Cook Time 45

Total Time 55

Servings servings

Calories 491kcal

Author Carmy

Ingredients

For the Caramelized Onions

4 tablespoons butter unsalted
2 tablespoons olive oil
4 to 5 yellow onions sliced

For the Mashed Potatoes

3½ pounds russet potatoes or Yukon gold
4 to 5 tablespoons butter unsalted
1 cup parmesan cheese shredded
½ cup milk or heavy cream
1 teaspoon salt
chives optional garnish

Instructions

Heat the butter and oil in a large skillet over medium heat. Add the onions and sauté for 5 minutes or until the onions have softened.
Reduce the heat to medium-low and cook for around 40 to 50 minutes. Stir the onions with a wooden spoon or spatula every few minutes or until the onions are golden brown and caramelized to your liking. Add more butter or oil as needed.
Around 20 minutes into making the caramelized onions, bring a (covered) pot of salted water with the potatoes to a boil. Once it has reached a boil, slightly uncover the pot and simmer until the potatoes are fork-tender, about 10 to 15 minutes, depending on how large the potatoes are.
Drain the potatoes and add them to a large bowl. Mash with a potato masher (or a potato ricer) until there are no more large chunks.
Add the butter, parmesan cheese, milk or cream, and salt. Continue to mash until smooth, and then add the caramelized onions.
Using a spatula, stir until everything is evenly distributed. Add additional salt and pepper and top off with chives as desired.

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