This light, airy, and moist coconut cake is loaded with the goodness of coconut. It uses desiccated coconut and coconut cream in the cake as well as in the filling. And, it's frosted with a delicious Swiss meringue buttercream.
Place egg whites and sugar in the bowl of the stand mixer.
Using a whisk, place the bowl over a double boiler and constantly whip until all the sugar has dissolved and the egg whites are fairly warm (about 160 F).
Take the bowl off the heat and whip the egg whites until you have a thick meringue with stiff peaks.
Let the mixer continue to whip on medium-low until the mixer bowl feels cool to touch.
Then, gradually add butter, one cube at a time, with the mixer on medium speed.
Once all the butter is in, whip on medium-high for 2 minutes.
Lastly, add the vanilla extract and rum.
Assemble
Once cooled, cut the domes off the cake layers with a serrated bread knife or cake leveler.
Brush each layer with simple syrup on both sides.Tip - Simple syrup is just water and sugar boiled then cooled. This keeps the cake moist
Fill the cake - Pipe a buttercream dam on the cake layer (see video).
Top with a big dollop of the coconut cream filling – spread evenly with an offset spatula or spoon but within the piped buttercream dam/edge (see video).
Then, top the second cake layer on top followed by buttercream dam and filling.
Then, place the last cake layer on top.
Place the cake in the fridge for at least 30 minutes, so the layers hold together and the filling will not leak out.
Crumb coat - Spread more buttercream around and top of the cake with a spatula (see video).
Chill the cake for another 15 to 30 minutes.
Second coat - then, spread more buttercream around and top fo the cake.
Use a bench scraper to smooth the sides of the cake and an offset spatula to smooth the top. Chill cake for 30 minutes.
Final smoothing - dip an off-set spatula and bench scraper in warm water and smooth the sides and top of the cake.
Chill the cake for 15 minutes.
Place the desiccated coconut on a parchment paper and spread it on the sides of the cake as shown in the video.
Tip - if you chill the cake for too long and the cake dries out just moisten the cake with some water before you add the coconut.
Garnish - I had cherries in the season so I used a lone cherry today (see video).
Video
Notes
Add the sugar gradually to the egg or they won't whip to light and foamy
Similarly add oil gradually so they emulsify in the egg similar to mayonnaise. If you add the oil to quickly the eggs will separate during baking causing it to deflate and give you a greasy cake.
Combine the flour and coconut cream in three batches and combine well but do not over mix to prevent deflating the whipped eggs
Keep an eye on the cake close to the baking time. Coconut cakes tend to dry out quickly. You want to check at about 20 minutes