Lynda's Heavenly Chocolate Cake | Longley Farm

Ingredients

• 300g Longley Farm Jersey butter at room temperature
• 200g caster sugar
• 225g soft light brown sugar
• 3 large eggs, beaten
• 350g plain flour
• 1 tsp vanilla extract
• 2 tsp baking powder
• 1 tsp bicarbonate of soda
• 100g cocoa
• Pinch of salt
• 150ml Longley Farm Buttermilk
• 150ml boiling water
• 200g dark chocolate, finely chopped
• 25g caster sugar
• 150g dark chocolate, chopped
• 3 large egg whites
• 250g Longley Farm Jersey butter, softened and diced