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Potato Mousseline

Total Time: 1 hour 15 minutes
Servings: 6
Calories: 331kcal


  • 3 pounds yellow potatoes
  • 1 tablespoon kosher salt
  • 1 stick ½ cup unsalted butter
  • ¾ cup whole milk
  • 1 cup heavy whipping cream
  • Salt and white pepper


  • Preheat the oven to 275F. Prep a 9x13” glass pan by spraying with non-stick cooking spray or rubbing butter along the edges and bottom.
  • Peel the potatoes and cut into evenly sized pieces. Place them in a large pot.
  • Fill the pot with cold water so that the potatoes are covered by one inch. Add one tablespoon of salt.
  • Place the pot on a stove top and bring to a boil on high heat. Cook the potatoes for about 15 minutes at a slow, steady boil. The potatoes should be very soft.
  • Drain the potatoes over the sink and return them to the pot.
  • Now, you need to dry out the potatoes a bit. Do this by keeping the pot on low heat and gently stir them so the steam slowly stops releasing. Remove from the heat.
  • Rice the potatoes into a large bowl. If you do not have a potato ricer, you can use a splatter screen or a fine mesh strainer to rice the potatoes.
  • Quickly wipe down the pot and add the milk and butter. Melt the butter into the milk, taking care not to scald the milk.
  • Slowly pour the milk and butter mixture into the rice potatoes. Stir gently with a rubber spatula or wooden spoon.
  • In a separate bowl, whisk the whipping cream until soft peaks form.
  • Scoop half of the whipped cream into the potatoes. Gently fold to incorporate the cream into the potatoes without mixing too hard.
  • Add the remaining whipped cream, salt, and white pepper. Repeat folding in all of the ingredients.
  • Taste the potatoes to check seasoning.
  • Pour the potatoes into the baking pan and gently smooth over with the rubber spatula so that the top is flat.
  • Bake at the low temperature (250F) for 25-30 minutes or until the potatoes are cooked through.
  • Scoop out the potatoes and serve immediately. Enjoy this decadent side dish.



Calories: 331kcal | Carbohydrates: 42g | Protein: 6g | Fat: 16g | Saturated Fat: 10g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 5g | Trans Fat: 1g | Cholesterol: 57mg | Sodium: 1206mg | Potassium: 1025mg | Fiber: 5g | Sugar: 3g | Vitamin A: 637IU | Vitamin C: 45mg | Calcium: 88mg | Iron: 2mg