Ingredients:

1 lb. mushrooms
2 oz. flour
2 oz. butter
2 tablespoons butter
Croutons
Milk
Salt and pepper

Directions:

“Thoroughly clean and dry the mushrooms but don’t peel. Slice them into a pan and simmer in butter for 5 minutes. Sprinkle with flour, stir gentle and cook for a further 2 minutes or so. Season, add heated (but not boiled) milk and simmer for a further 3 minutes. Now stir in the cream, immediately reheat well, and serve scattered with croutons of fried bread.”

(According to Dinner at Buckingham Palace, this is recipe which Prince Philip himself came up with, so the directions given could be a verbatim account from the Prince himself.)