Cook onion in butter until soft in 2 litre saucepan. Add flour and cook, stirring, until smooth. Stir in peanut butter, add chicken broth. Season to taste with salt and pepper. Cook, stirring, over low heat until thickened and smooth. Add cream. Just before serving, add Madeira. Created by: Velvet Turtle, Los Angeles (C) 1992 The Los Angeles Times