Cake Flour (2 ½ cups): This is non-negotiable for a tender crumb. Cake flour has a lower protein content (around 7-9%) compared to all-purpose flour, which prevents excess gluten formation.Granulated Sugar (1 ¾ cups): Essential for sweetening and locking in moisture during the baking process.Unsalted Butter (1 cup, softened): Using room-temperature butter allows for proper aeration when creamed with sugar.Large Eggs (4, room temperature): Eggs provide structure and stability. If they are cold, they will seize the butter and break your emulsion.Full-Fat Coconut Milk (1 cup): Shake the can well! The high fat content here is the secret to an incredibly rich and decadent sponge. Substitution: If you cannot find this, buttermilk mixed with a teaspoon of coconut extract can mimic the acidity and flavor.Sweetened Shredded Coconut (1 ½ cups): Adds both texture and an unmistakable flavor profile. Substitution: Unsweetened desiccated coconut works well if you want to reduce overall sugar intake, just soak it in a tablespoon of milk first to soften it.Pure Vanilla Extract (2 teaspoons): Enhances the overall flavor complexity.Baking Powder (2 teaspoons) & Baking Soda (½ teaspoon): The leavening agents responsible for that glorious lift.Kosher Salt (½ teaspoon): Balances the sweetness perfectly.