Cut the washed champignons into medium-sized pieces, place in a saucepan, add water and cook over medium heat.
Skim off the foam during cooking, add salt and pepper to taste, after boiling, cook until done for 10-15 minutes. Pour in the cream 5 minutes before the mushrooms are done.
Remove the mushrooms from the heat, add the butter and puree with an immersion blender until smooth. You can add spices, such as nutmeg or paprika, during the process.
Serve the finished mushroom puree with meat and fish dishes. You can garnish with fresh herbs to taste or serve with slices of meat, ham or lightly salted fish. Enjoy!