Ingredients

• Buttermilk Cake
• 13.75 ounces granulated sugar
  
• 2 tablespoons grated orange zest
  
• 10.5 ounces cake flour
  
• ³/₄ teaspoon baking powder
  
• ³/₄ teaspoon baking soda
  
• 0.25 teaspoons fine sea salt
  
• 8 ounces unsalted butter, softened to room temperature
  
• 1 cup buttermilk
  
• 4.5 large eggs
  

• Chocolate Icing & Assembly
• 24.25 ounces icing sugar
  
• 3.25 ounces cocoa powder
  
• ³/₄ cup whole milk
  
• 3 tablespoons unsalted butter
  
• 1 tablespoon Grand Marnier
  
• 4 tablespoons blood orange marmalade or other flavourful fine cut marmalade
  
• 3 cups unsweetened shredded coconut