Coconut-Rum Cake with Lemon Curd and White Chocolate Ganache

Toasted coconut and white chocolate ganache tops this layered and filled lemon-coconut cake that's so impressive, it's worth the effort.

• Preparation Time: 60 mins
• Cooking Time: 60 mins
• Total Time: 2 hr
• Calories: 775 Calories

Ingredients

• 1 teaspoon vanilla extract
• 1 tablespoon lemon zest
• 2 tablespoons light corn syrup
• 1 tablespoon baking powder
• 1 large egg
• 3 cups cake flour
• 3 tablespoons unsalted butter
• 1 tablespoon cornstarch
• 4 tablespoons unsalted butter
• 2 tablespoons unsalted butter
• 3 large eggs
• 4 teaspoons cornstarch
• 1 large egg yolk
• 2 large egg yolks
• 1 cup unsalted butter, at room temperature
• 1 fluid ounce coconut-flavored rum (such as Malibu®)
• 5 large eggs, at room temperature
• 1 cup full-fat coconut milk
• 1 teaspoon coconut-flavored rum (such as Malibu®)
• 9 ounces white chocolate melting wafers (such as Ghirardelli®)
• 1 cup toasted sweetened flaked coconut
• 0.5 teaspoon salt
• 0.33333334326744 cup heavy cream
• 0.25 cup water
• 0.5 cup white sugar
• 0.75 cup white sugar
• 0.25 cup white sugar
• 1.5 cups white sugar
• 0.66666668653488 cup heavy cream
• 0.5 cup fresh lemon juice
• 0.66666668653488 cup full-fat coconut milk
• 0.5 fluid ounce coconut-flavored rum (such as Malibu®)

Recipe Instructions

Step 1

Preheat the oven to 350 degrees F (175 degrees C). Grease and lightly flour three 9-inch metal cake pans.

Step 2

Sift cake flour, baking powder, and salt for cake into a bowl and set aside. Whisk eggs, coconut milk, heavy cream, and vanilla extract together in a small bowl until well combined.

Step 3

Cream sugar and butter together in a large bowl until light and fluffy, scraping down as needed. Add 1/3 of the flour mixture and mix on low speed until incorporated. Add 1/2 of the milk mixture and mix on low until evenly incorporated. Repeat, ending with remaining flour mixture, scraping down the bowl after each addition and mixing at medium speed until well incorporated, about 1 minute. Evenly split batter among the prepared cake pans.

Step 4

Bake in the preheated oven until a toothpick inserted into the center comes out clean and cakes are starting to pull away from the sides of the pans, 30 to 40 minutes. Allow to cool in the pans for 5 to 10 minutes; invert onto a cooling rack to cool completely, about 30 minutes.

Step 5

While cakes cool, make lemon curd. Mix sugar and cornstarch well in a small bowl and set aside. Whisk whole eggs and egg yolks together in a small bowl and set aside.

Step 6

Heat lemon juice and zest in a small saucepan over medium-low heat until hot. Add sugar and cornstarch mixture all at once. Bring back to a simmer, stirring constantly. Whisk some of the hot lemon mixture into the eggs to temper them. Pour back into the saucepan. Cook, stirring constantly, until thick, 5 to 10 minutes.

Step 7

Remove curd from heat and add butter. Mix until smooth. Strain curd if necessary and place in a small bowl. Press plastic wrap against the surface and chill, at least 20 minutes.

Step 8

Meanwhile, make pastry cream. Mix sugar and cornstarch together in a small bowl. Whisk egg and egg yolk together in a small bowl until well mixed.

Step 9

Heat coconut milk in a small saucepan until simmering. Add sugar-cornstarch mixture and whisk until smooth and sugar is melted. Whisk some of the hot milk into the eggs to temper them. Pour back into the saucepan and cook, stirring constantly, until thickened, 3 to 5 minutes.

Step 10

Remove pastry cream from heat and stir in butter and coconut rum; mix until smooth. Strain if necessary, cover with plastic wrap, and refrigerate until cold, about 20 minutes.

Step 11

For the simple syrup, bring sugar, water, and rum to a boil in a medium saucepan. Boil for 1 minute. Remove from heat and allow to cool, 15 to 20 minutes.

Step 12

For the ganache, combine heavy cream, butter, corn syrup, and rum in a small saucepan. Bring to a simmer. Pour hot cream mixture over chocolate and let sit for 5 to 10 minutes. Mix until smooth. Allow to cool to lukewarm, 5 to 10 minutes.

Step 13

Trim tops of cake layers to be flat, if needed. Place 1 cooled cake layer onto a serving plate. Brush with 1/2 of the simple syrup. Cover with 1/2 of the pastry cream. Drop spoonfuls of lemon curd on top and smooth out carefully. Repeat with a second layer and remaining syrup, pastry cream, and curd. Carefully place the third cake layer on top. Frost the entire cake with ganache and sprinkle toasted coconut over the sides and top.