Fail-safe chocolate and yoghurt cake

Ingredients

• 1 cup sunflower (or other flavourless) oil
• 2 large eggs
• 2 cup sugar (yes, it’s a lot but this is a big cake)
• 3 cup plain flour
• 3 teaspoon baking powder
• 1/2 cup cocoa
• 1 teaspoon baking soda
• 1 teaspoon vanilla essence
• 1/2 teaspoon salt
• 1 cup natural unsweetened yoghurt
• 1 cup strong black coffee, cooled
• grated chocolate, to garnish
• whipped cream, to serve (optional)
• Icing
• 2 cup icing sugar
• 50 gram butter, softened
• 1/4 cup cocoa
• 1-2 tsp boiling water
• Ganache
• 125 millilitre cream
• 200 gram dark chocolate, chopped