In a saucepan combine sweetened condensed milk and milk chocolate. (I used chocolate bars, broken into small pieces, chocolate chips would be great also.)
Heat on the stove top over low heat, while staring until the chocolate melts completely and is combined with the sweetened condensed milk.
Serve while warm in individual ramekins, or place the warm chocolate mixture in a fondue pot and serve with marshmallows, and graham crackers as dippers.