Bailey's chocolate mud truffle cake

Ingredients

• 500 g butter
• 400 g dark chocolate
• 2 cups hot water
• 2 1/2 cups castor sugar
• 1/2 cup Bailey's Irish Cream Liqueur
• 4 eggs, lightly beaten
• 3 cups plain flour
• 1/2 cup dutch cocoa
• 4 teaspoons baking powder