Melting chocolate on the stove top is the preferred method. A double boiler gives you the best control over the heat. The steam of the simmering water gently melts the chocolate so that it doesn't burn.Create a double boiler by bringing a medium pot filled a little less than halfway with water to a simmer. Place a heatproof bowl that's just big enough to sit on top of the pot and add your chocolate chips or chopped chocolate bar to the bowl.