Preheat oven to 180 degrees Celsius. Grease a 22cm bundt pan with soft butter
In a large bowl mix the melted butter, oil and cocoa. Dissolve the espresso powder in the boiling water and mix it in. Melt the chocolate in the microwave at 20 second increments mix it into the liquids
Mix in the vanilla essence
Sift in the sugar, flour and baking powder. Gently mix until combined
Mix the eggs with the buttermilk and slowly fold it into the batter. Do not over mix
Pour the cake batter into the pan and bake at 180 degrees Celsius for 30-35 minutes or until a toothpick inserted comes out clean
Remove cake from oven and wait 10 minutes before turning the cake onto a wire rack. Once turned onto the wire rack wait 5 minutes before lifting the pan off the cake
For the glaze, break the chocolate into small pieces and pop it into a heat proof bowl. Heat the cream o the stovetop until it's hot, do not let it boil. Slowly mix it into the chocolate until the chocolate melts. You should have a silky smooth glaze
Spread the glaze over the cake whilst still warm. You can add a little more cream if you want a more liquid glaze