Caramelized Onion Mashed Potatoes Recipe

Creamy, buttery mashed potatoes blended with golden caramelized onions for the ultimate comfort side dish. Sweet, savory, and rich — ready in just 45 minutes.

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Course: Side Dish

Cuisine: American, Comfort Food

Prep Time: 15

Cook Time: 30

Total Time: 45

Servings: servings

Calories: 315kcal

Cost: $7

Equipment

1 Large Heavy-Bottomed Pot Even cooking for potatoes
1 Cast-iron or stainless steel skillet Best for caramelizing onions
1 Potato masher Creates creamy yet textured mash
1 Fine-mesh strainer or colander Drains potatoes thoroughly
1 Wooden spoon Gentle stirring without scratching
1 Small saucepan To warm cream and butter mixture

Ingredients

Mashed Potatoes

3 pounds Yukon Gold potatoes Creamiest texture, holds shape well
1 cup Heavy cream Adds richness and silkiness
6 tablespoons Butter Unsalted preferred for flavor control
Salt and black pepper To taste
2 cloves Garlic, minced Optional, adds depth

Caramelized Onions

3 large Yellow onions, thinly sliced Caramelizes beautifully
3 tablespoons Butter For caramelizing onions
1 tablespoon Olive oil Prevents butter from burning
1 teaspoon Sugar Optional, speeds caramelization
2 tablespoons Fresh thyme leaves Adds earthy aroma
Salt To taste for onions

Instructions

Heat skillet with butter and olive oil; add onions, salt, and sugar. Cook slowly until golden brown (25–30 min), stir occasionally, add thyme near end.
Peel and chop potatoes; boil in salted water until fork-tender (15–18 min). Drain and steam dry.
Warm cream, butter, and garlic in saucepan. Mash potatoes, gradually add cream mix, fold in most onions.
Taste, adjust seasoning, top with reserved onions and butter pat. Serve hot with thyme garnish.

Notes

Nutrition information is automatically calculated, so should only be used as an approximation.

Nutrition