Maître d’Hotel

4 ozs. butter
¹⁄₂ pint milk
1 tea-spoon flour
1 dessert-spoon finely chopped parsley
Juice of a lemon

Mix the flour and butter together till smooth. Melt in a sauce-pan. Add the boiling milk. Let all boil for three or four minutes, stirring constantly. Add the parsley and lemon juice.