Grab a frying pan and brown the bacon or sausage. Remove the bacon and crumble it when it cools. Add the butter in the same pan and let it melt. Add the flour to make a roux with the butter and bacon grease. When the roux is smooth, add the milk and stir until completely cooked through. Add the bacon bits or sausage pieces. Salt and pepper to taste. I add a little sugar which is optional.