Combine equal amounts of rice and milk in a saucepan. Add raisins if desired.
Bring to a slow boil over medium heat and then immediately reduce heat to low and simmer for approximately 5 minutes or until porridge is creamy. Stir frequently so that it doesn't stick to the bottom of the pan and burn.
Remove from heat and add butter, sugar and cinnamon to taste.
Try variations with other dried fruit such as cranberries or apricots or fresh chopped apple or banana.