With the wooden spoon, and over medium heat, continue stirring as the butter melts. Constantly stirring, to prevent the mixture from burning, bring the melted, combined mixture to a gently rolling boil. Boil for 5 minutes. As you lift the wooden spoon up, if the mixture still runs off the spoon, it is not cooked enough. If the mixture clings to the spoon before dripping off, it is just about right. Remove from the heat.