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4.13 from 16 votes

Roasted Mashed Potatoes

These creamy oven Roasted Mashed Potatoes start with Yukon Golds mashed with a hot thyme, lemon and garlic milk infusion. A perfect holiday or anytime side! Adapted from Bon Appetit.
Prep Time15 mins
Cook Time1 hr
Total Time1 hr 15 mins
Course: Side Dish, Vegetable
Cuisine: American, Western
Keyword: roasted mashed potatoes
Servings: 8
Calories: 334kcal


  • 4 lb. Yukon Gold potatoes (See Note 1)
  • 10 garlic cloves
  • 1 lemon
  • 2 cups whole milk
  • 3 sprigs thyme
  • 2 tsp black peppercorns
  • 12 tbsp butter
  • 1 tbsp salt


  • Preheat oven to 400°F. Place Yukon Gold potatoes on a rimmed baking sheet or in a large baking dish and cover tightly with foil. Roast until very tender, 60-65 minutes.
  • Using side of knife, bruise or smash the garlic cloves. Using a vegetable peeler, remove a wide 3 inch strip of zest from lemon and add to pot. Save lemon for other use.
  • Place milk in a medium saucepan with garlic, thyme, peppercorns, butter and kosher salt.
  • Bring mixture to a simmer over medium high heat, stirring so bottom doesn't scorch. Remove from heat, cover, and let sit for 30 minutes.
  • When potatoes are done, use a small knife to remove skins, or leave skins on if you like (I like the roasted flavors they add). Mash them in a large pot with a potato masher, or pass potatoes through a ricer or food mill fitted with the fine disk into the pot.(See Note 2).
  • Pour infused milk through a mesh sieve into pot with potatoes, discard solids. Place potato mixture over medium heat and stir until milk is incorporated into potatoes. Taste and season with more salt if needed. Drizzle more melted butter on top before serving. Drizzle more melted butter on top before serving or cover and keep warm until ready to serve.


  1. If using Red Potatoes or German Butterballs, place potatoes on a rimmed baking sheet or in a cast-iron skillet and roast until tender 45–50 minutes.
  2. I prefer to use a potato masher and keep then slightly chunky and rustic. If you're a smooth and creamy mashed potato lover, then by all means rice or use a food mill.


Calories: 334kcal | Carbohydrates: 34g | Protein: 8g | Fat: 20g | Saturated Fat: 12g | Cholesterol: 52mg | Sodium: 674mg | Potassium: 1071mg | Fiber: 6g | Sugar: 3g | Vitamin A: 649IU | Vitamin C: 35mg | Calcium: 159mg | Iron: 8mg