Place cocoa powder in a small bowl. Set aside.
Place chocolate pieces in a medium bowl. Set aside.
Combine sugar and water in a small saucepan.
Heat over medium heat, stirring constantly, until sugar is completely melted.
Pour over cocoa powder.
Stir together. Set aside.
In a small saucepan, combine cream and corn syrup.
Cook over medium heat until it just starts to boil.
Pour over chocolate pieces.
Let stand, without stirring, for 2 minutes.
Stir together with a wooden spoon or a spatula.
Stir in bloomed cocoa powder.