Melt chocolate in a saucepan over low heat. Keep an eye on the chocolate to prevent burning.
Once most of the chocolate is melted, add in heavy cream and stir until incorporated.
Add cocoa powder and sugar and stir vigorously to get rid of any lumps. Cook mixture for two minutes or so, allowing it to thicken.
Add red wine to saucepan and continue cooking for no more than another minute, stirring continuously. Do not bring to a boil. Remove from heat and serve warm.