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mashed potatoes with caramelized onions and cheese garnished with chopped parsley and melted butter

How to Make Mashed Potatoes with Caramelized Onion and Cheese

Love Keil
How to make Cheesy mashed potatoes with melted Gruyere cheese & delicious caramelized onions. This is the best mashed potatoes recipe ever.
Prep Time 10 mins
Cook Time 40 mins
Course Side Dish
Cuisine American
Servings 6 servings
Calories 494 kcal


To Make Mashed Potatoes

  • 4 lb golden potatoes cut into 2 inch cubes
  • 1 teaspoon sea salt plus more for boiling water
  • 1 1/4 cup whole milk warm
  • 5 tablespoons butter melted
  • 1/2 teaspoon black pepper or to taste
  • 1 cup Gruyere cheese grated, more if desired
  • parsley finely chopped for garnish

To Make Caramelized Onion

  • 2 large onion diced
  • 2 tablespoons butter or use olive oil
  • 1/2 teaspoon sugar
  • salt and pepper to taste


How to Make Caramelized Onion

  • Start making caramelized onion first. To make caramelized onion add butter, onion, salt and sugar to the skillet and sauce over medium heat, stirring occasionally.
  • Cook for 20-30 minutes, or until onions are caramelized, stirring a few times. Be careful not to burn it (adding more butter or oil if needed).

 How to Make Mashed Potatoes

  • While onions are cooking add cubed potatoes into a pot and add water to cover, 2 teaspoons of salt, and bring it to a boil over medium-high heat. Cook for 20 minutes or until potatoes are tender when pierced with a knife. Drain.
  • Mash potatoes with a potato masher. Next, add milk, butter, salt and pepper, mix using a hand mixer.
  • Next, stir in caramelized onions about 1 cup and 1 cup of cheese, stir until everything is combined. Garnish with freshly chopped parsley and sprinkle black pepper over the top.


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Calories: 494kcalCarbohydrates: 60gProtein: 15gFat: 22gSaturated Fat: 14gPolyunsaturated Fat: 1gMonounsaturated Fat: 6gTrans Fat: 1gCholesterol: 64mgSodium: 620mgPotassium: 1437mgFiber: 8gSugar: 7gVitamin A: 707IUVitamin C: 63mgCalcium: 333mgIron: 3mg
Keyword cheese, mashed potato, onion
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