Caramel coconut macaroon slice

Ingredients

• Macaroon slice
• 90 gram (3 ounces) unsalted butter, softened
• 1/2 cup (110g) caster sugar
• 1 egg
• 2/3 cup (100g) plain flour
• 1/3 cup (50g) self-raising flour
• Caramel and coconut topping
• 3 eggs, lightly beaten
• 1/4 cup (60ml) milk
• 60 gram (2 ounces) unsalted butter
• 1 teaspoon coconut essence
• 1 1/4 cup finely packed brown sugar
• 2 cup shredded coconut