Crockpot Cheesy Mashed Potatoes with Caramelized Onions

4.99 from 131 votes

This make-ahead method makes for the creamiest and most flavorful mashed potatoes!

Prep Time30

Cook Time4

Total Time4 30

Course: Side Dish

Cuisine: American

Key Ingredient: carmelized onions, Gruyère cheese, potatoes

Servings:

Calories: 521kcal

1. In the bowl of your crockpot, combine the potatoes, water, garlic, and salt. Cover and cook on high for 4 hours or on low for 6-8 hours, until the potatoes are fork tender. Set the crockpot to low or warm.
2. Drain the potatoes, then add them back to the crockpot. Let sit, uncovered while you caramelize the onions.
3. Melt together 4 tablespoons butter and the onions in a large skillet over medium heat. Cook, stirring occasionally until softened, about 10 minutes. Add the wine and continue to cook another 5 minutes until the onions are deeply caramelized.
4. Add 4 tablespoons butter, the thyme, and sage, and season with salt and pepper. Cook another 2 minutes, then remove from the heat.
5. Mash the potatoes with a masher. Add the cream and sour cream, adding more cream until your desired consistency is reached. Season the potatoes with salt and pepper. Stir the onions in with the butter and cheese, cover, and cook another 15 minutes, or until the cheese is melted and creamy. Keep the potatoes covered, on warm, for up to 4 hours.

1. In the bowl of your instant pot, combine the potatoes, water, garlic, and salt. Cover and cook on high pressure for 14 minutes. Release the steam, drain the potatoes, then add them back to the instant pot.
2. Set the instant pot to warm. Let sit, uncovered while you caramelize the onions.
3. Melt together 4 tablespoons butter and the onions in a large skillet over medium heat. Cook, stirring occasionally until softened, about 10 minutes. Add the wine and continue to cook another 5 minutes until the onions are deeply caramelized.
4. Add 4 tablespoons butter, the thyme, and sage, and season with salt and pepper. Cook another 2 minutes, then remove from the heat.
5. Mash the potatoes with a masher. Add the cream and sour cream, adding more cream until your desired consistency is reached. Season the potatoes with salt and pepper. Stir the onions in with the butter and cheese, cover, and cook another 15 minutes, or until the cheese is melted and creamy. Keep the potatoes covered, on warm, for up to 4 hours.

1. In a large dutch oven, combine the potatoes, 6 cups water, the garlic, and salt. Bring to a boil over medium-high heat and cook 20-25 minutes, until the potatoes are fork tender. Drain the potatoes, then add them back to the pot.
2. Finish as directed through step 3.

Calories: 521kcal