Fry your sausage until well browned and done. Pour off all sausage fat except 3-4 tablespoons. Add 2 1/2 tablespoons of flour to the fat in skillet and brown slightly. Add a bowl of milk slowly and let come to a boil, stirring all the time. Simmer 5 minutes. Crumble fried sausage patties into the gravy and pour on hot biscuits.