Perfect Shiny Chocolate Sauce

In a saucepan, combine the melted chocolate, butter, sugar (if using), water, and corn syrup.

Bring the mixture to a boil over medium heat, stirring constantly until everything is heated and completely melted.

Let the sauce boil for approximately 3 minutes, stirring occasionally.

Remove from the heat. The sauce should be liquid, but it will thicken as it cools down.

Use the cooled sauce on cakes, ice cream, or anything you desire.