Lamington Slice - The Healthy Baker

Ingredients

• 1 ½ cups caster sugar
• 2 ½ cups The Healthy Baker Plain Flour
• 1 ½ teaspoon salt
• 1 ½ teaspoons bicarbonate of soda
• 1 ½ teaspoons baking powder
• 2 large eggs
• 1 cup buttermilk
• ½ cup azure canola oil
• 1 teaspoon vanilla paste
• ¾ cup icing sugar
• 2 tablespoons cocoa powder
• ½ cup water, boiling
• 30g butter, melted
• 1 cup desiccated coconut