Foil should be long enough for the bisquits to be laid out in a line. Place enough butter on the foil to completly coat it. Place bisquits in the center and seal foil. Make sure the foil is a little baggy around the bisquits. Rap in another strip of foil and place directly on the coals. Turn every minute. Depending on the heat will be done within 5-8 minutes. The butter acts as the grease and you don't need to butter them when they are done