Easy Homemade Lamingtons

Name: Easy Homemade Lamingtons
Prep time: 45 min
Cook time: 25 min
Total time: 1 h 10 min
Cuisine: Australian
Ingredients: 70 grams (1/2 cup) plain flour or all purpose flour; 35 grams (1/4 cup) cornflour or cornstarch; 1/2 teaspoon baking powder; 3 large eggs, room temperature; 50 grams (1/4 cup) caster sugar; 2 tablespoons milk; 1 tablespoon butter; 40 grams (1/2 cup) cocoa powder; 250 grams (2 cups) icing or powdered sugar; 2 tablespoons unsalted butter, melted; 120 ml (1/2 cup) milk; 120 grams (2 cups) shredded coconut