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5 from 1 vote
potato rosti recipe
Potato Rosti with Mushroom Sauce
Prep Time
10 mins
Cook Time
20 mins
Total Time
30 mins

Comforting and delicious potato rosti with sour cream mushroom sauce

Course: Appetizer or Side Dish, Dinner
Cuisine: American, French
Servings: 4
Calories: 346 kcal
Author: Vicky
  • 2 1/2 pounds potatoes peeled and grated
  • 1 teaspoon salt
  • 1-2 teaspoons black pepper
  • 1 egg lightly beaten
  • 2 tablespoons cornstarch
  • 3 tablespoons oil
  • 1 tablespoon butter
  • 1/2 small onion diced
  • 1 pint white mushrooms thinly sliced
  • sour cream
  • fresh basil slivered (optional)
  1. Using a cloth or paper towels wrap the grated potato up and squeeze out all of the liquid (potato starch).
  2. In a large bowl combine grated potato, egg, cornstarch, salt and pepper. Mix until combined.
  3. Heat a pan (cast iron is best) over medium-high heat, add 1 tablespoon oil and wait for it to heat up.
  4. Add half of potato mixture to pan and flatten it to make sure it's even all around. Reduce heat to medium.
  5. Cook for 8-10 minutes (checking at 6 minutes) on one side or until golden brown, and cook 6-8 minutes (adding more oil if necessary) on the other side (to flip rosti over - slide the rosti onto a plate first, then cover it with another plate, flip the two plates and then slide the uncooked side back onto the pan). Repeat with the other rosti.
  6. For the mushroom sauce heat butter in a pan over medium heat and add diced onion. Cook for a few minutes, remove, and add sliced mushrooms to the pan. Cook mushrooms until starting to brown, add onions back to the pan, reduce heat to low, and add a few dollops of sour cream (to reach desired consistency).
  7. Serve rosti with mushroom sauce and fresh slivered basil (optional).
Nutrition Facts
Potato Rosti with Mushroom Sauce
Amount Per Serving
Calories 346 Calories from Fat 135
% Daily Value*
Fat 15g23%
Saturated Fat 3g19%
Cholesterol 48mg16%
Sodium 657mg29%
Potassium 1582mg45%
Carbohydrates 44g15%
Fiber 8g33%
Sugar 2g2%
Protein 12g24%
Vitamin A 145IU3%
Vitamin C 35.8mg43%
Calcium 98mg10%
Iron 10mg56%
* Percent Daily Values are based on a 2000 calorie diet.