Dark and sumptuous chocolate cake - Penguin Books Australia

Ingredients

• 60ml cold water
• 75g coconut butter (this is not the same as oil)
• 50g soft dark sugar
• 1½ teaspoons instant espresso
• 1½ x 15ml tablespoons cocoa
• 150g dark chocolate (min. 70% cocoa solids, see Intro), finely chopped
• 225g plain flour
• 1½ teaspoons bicarbonate of soda
• ½ teaspoon fine sea salt
• 1½ teaspoons instant espresso powder
• 75g cocoa
• 300g soft dark brown sugar
• 375ml hot water, from a recently boiled kettle
• 90ml (75g if weighed when solid) coconut oil
• 1½ teaspoons cider vinegar or white wine vinegar
• 1 x 15ml tablespoon edible rose petals
• 1 x 15ml tablespoon chopped pistachios
• 1 x 20cm round springform cake tin