Mochaccino mud cake

Ingredients

• 1 small_piece butter, stick
• 3 tablespoons butter, chopped coarsely
• 104 millilitres dark chocolate, chopped coarsely
• 1 1/3 cup sugar
• 2/3 cup water
• 1/4 cup coffee liqueur
• 3 tablespoons instant coffee granules
• 1 cup all-purpose flour
• 3 tablespoons self-rising flour
• 3 tablespoons cocoa powder
• 1 egg
• 1 1/2 cup heavy cream, whipped
• 3 tablespoons chocolate syrup
• 1 1/2 tablespoon cocoa powder