1-Boil the spaghetti in a pot for 10 minutes. 2-Melt the butter in a frying pan. 3-Fry the bacon in the same frying pan. 4-Add some cream and pepper. 5-Later add some milk. 6-Drain the spaghetti ina colander. 7-Put the spaghetti in the same pot. 8-Add the carbonara sauce to the spaghetti.