Chocolate Buttercream Cake Recipe | Food Network UK

Ingredients

• For the cake
• 350g plain flour
• 135g good cocoa powder
• 2 1/4 tsps bicarbonate of soda
• 1/2 tsp salt
• 220g unsalted butter, at room temperature
• 220g sugar
• 170g light brown sugar, packed
• 3 extra-large eggs, at room temperature
• 3 tsps pure vanilla essence
• 375ml buttermilk, at room temperature
• 190g sour cream, at room temperature
• 3 tbsps brewed coffee
• 1 recipe orange buttercream, recipe follows
• For the orange buttercream
• 450g sugar
• 160ml water
• 6 extra-large egg whites, at room temperature
• 1/4 tsp cream of tartar
• 560g unsalted butter, at room temperature
• 2 tsps pure vanilla essence
• 3 tbsps Triple Sec or other orange liqueur
• 1 tbsp orange food colouring