• 2 oz. butter
• 6 button mushrooms or mushroom trimmings
• 12 peppercorns
• a few parsley stalks
• 2 oz. flour
• 1 pt. good white stock
• salt and pepper
• lemon juice
• ⅛–¼ pt. cream

Melt the butter in a saucepan and gently cook the mushrooms, peppercorns and parsley for 10 min. Add the flour and cook for a few minutes without browning it. Stir in the stock, bring the sauce to simmering point and simmer for 1 hr. Wring the sauce through a tammy cloth or damp muslin. Season, add lemon juice, and reheat. Just at boiling-point stir in the cream. The mushrooms may be rinsed and used as garnish for the dish.

Serve with chicken, veal, sweetbreads, fish or vegetables.