Preheat the oven to 350 degrees Fahrenheit and grease the bottom and sides of two 9-inch round cake pans with non-stick cooking spray.: As the oven warms you'll smell a faint warmth that signals the air is ready to transform batter into cake, and the greased pans will ensure an easy release. Preheating is crucial because putting batter into a cold oven changes the rise and texture, often resulting in a dense center. One common mistake is skipping the greasing step or using too little, which can cause sticking when you try to remove the cakes.
In a large bowl combine 1 (13.25-ounce) strawberry cake mix, 1/2 cup softened unsalted butter, 3/4 cup canned coconut milk, 1/2 cup water, and 3 large eggs until incorporated. Mix on high for 2 minutes using an electric hand mixer then pour the batter into the prepared pans.: When you start combining the strawberry cake mix with the wet ingredients, the batter should smell sweet and slightly fruity, and the coconut milk will lend a faint tropical note. Mixing on high for the two minutes builds air into the batter which helps lift it during baking. Look for a uniform color and smooth texture before pouring, because unmixed pockets of flour will produce dense spots. Avoid overmixing past the specified time, as this can develop too much gluten and make the crumb tough.
Bake for 30-35 minutes or until toothpick inserted in the center comes out clean. Cool completely.: During baking you will notice the edges pull away slightly from the pan and the top will set to a light spring when gently pressed. If you insert a toothpick it should come out with no wet batter, though a few moist crumbs are fine. Cooling completely is essential because warm cake will make the frosting slide and become runny. A frequent error is frosting too soon; patience here preserves texture and presentation.
In a large bowl, combine 1 (8-ounce) package cream cheese, and 1/2 cup unsalted butter. Mix with an electric hand mixer until smooth and creamy. Add 4 cups powdered sugar and mix. Add 1 teaspoon coconut extract and 2-3 tablespoons heavy cream. Mix until combined.: The moment you start whipping the cream cheese and butter , you'll feel the texture shift from grainy to velvety, and the aroma will take on a subtle tang. Adding the powdered sugar gradually helps keep the bowl tidy and ensures a smooth finish. The coconut extract brightens the flavor, while the heavy cream adjusts the frosting to a spreadable consistency. If it looks too thin, chill briefly; if too stiff, add one teaspoon of heavy cream at a time. Avoid overbeating after the sugar is fully incorporated, as it can loosen the structure and create a runny frosting.
Garnish with coconut flakes if desired and enjoy!: The final garnish of coconut flakes adds a toasty texture and accentuates the coconut note, while visually signaling what to expect on the first bite. When you slice the cake, you want clean edges and a frosting that holds shape. A common slip is waiting too long to garnish, which can result in flakes sinking into a softer frosting. Serve slices at room temperature so the flavors are most expressive.