01 -
Preheat your oven to 175°C. Lightly grease a 23x33cm baking dish with cooking spray or butter, or line it with parchment paper for easier removal, leaving some overhang on the sides as handles.
02 -
In a large mixing bowl, combine the chocolate cake mix, eggs, vegetable oil, and water. Mix according to package instructions for about 2 minutes with an electric mixer on medium speed until smooth. Scrape down the sides of the bowl to fully incorporate all dry ingredients.
03 -
Pour the cake batter into the prepared baking dish, spreading evenly with a spatula. Bake in the preheated oven for 25-30 minutes, or until a toothpick inserted into the center comes out clean or with just a few moist crumbs.
04 -
While the cake is baking, make the coconut filling. In a medium bowl, combine the sweetened condensed milk, shredded coconut, and powdered sugar. Stir until thoroughly mixed into a thick and sticky consistency.
05 -
When the cake is done, remove it from the oven and place on a cooling rack. Allow to cool for 10 minutes, then spread the coconut mixture evenly over the still-warm cake, going all the way to the edges.
06 -
Heat the heavy cream in a medium saucepan over medium heat until it just begins to simmer with small bubbles forming around the edges. Do not boil. Pour the hot cream over the chocolate chips in a heatproof bowl. Let sit undisturbed for 1-2 minutes, then whisk gently until smooth and glossy. Stir in the vanilla extract.
07 -
While still warm and pourable, slowly pour the ganache over the coconut layer, covering it completely. Use an offset spatula or the back of a spoon to spread it evenly. If desired, sprinkle additional coconut or chocolate shavings on top for decoration.
08 -
Refrigerate the cake for at least 1 hour, or until the chocolate layer is completely set. Cut into squares and serve chilled or at room temperature. Store leftovers covered in the refrigerator for up to 5 days.