Description
Creamy mashed potatoes mixed with sweet caramelized onions. This side dish uses Yukon gold potatoes, butter, and thyme for rich flavor.
Ingredients
- 3 large yellow onions, thinly sliced
- 2 tablespoons unsalted butter
- 1 tablespoon olive oil
- 1/2 teaspoon salt (for onions)
- 1 teaspoon fresh thyme leaves
- 3 pounds Yukon gold potatoes, peeled and cut into 1-inch chunks
- 1 tablespoon salt (for potatoes)
- 4 tablespoons unsalted butter, softened
- 1 cup whole milk, warmed
- 1/2 cup sour cream
- 1/2 teaspoon black pepper
Instructions
- Heat butter and oil in a large skillet over medium-low heat.
- Add sliced onions and salt. Cook, stirring occasionally, for 30 to 35 minutes until deep golden brown.
- Stir in thyme leaves during the last 5 minutes. Remove from heat and set aside.
- Place potatoes in a large pot and cover with cold water by 1 inch. Add 1 tablespoon salt.
- Bring to a boil over high heat, then reduce to simmer for 12 to 15 minutes until fork-tender.
- Drain potatoes and return to pot over low heat for 1 minute to evaporate moisture. Remove from heat.
- Mash potatoes with softened butter using a potato masher.
- Stir in warm milk, sour cream, pepper, and three-quarters of the caramelized onions until smooth.
- Taste and adjust salt if needed. Transfer to a serving bowl.
- Top with remaining caramelized onions. Serve immediately.
Notes
- Use Yukon gold potatoes for the creamiest texture.
- Warming the milk helps keep the potatoes hot during mixing.
- Caramelize onions slowly over medium-low heat for the best sweetness.
- Prep Time: 20 minutes
- Cook Time: 50 minutes
- Category: Side Dish
- Method: Stovetop
- Cuisine: American