This beautiful tropical layer cake is bursting with delicious flavors of vanilla, passion fruit, mango, and chocolate. The cake is covered with vanilla buttercream and decorated with a dripping chocolate ganache and beautiful decorations.
A Delicious Fresh Tropical Layer Cake
I recently celebrated my birthday and of course that called for a birthday cake! After a long winter of gray skies and dreary rain, I’ve been dreaming of sunshine and sandy beaches. Since those are still far off, I decided to fill my cake with flavors of tropical fruits that remind me of warm summer days!
And I’m glad I did, because the result was absolutely delicious! This tropical layer cake features moist vanilla layers with a rich passion fruit curd and a light, fluffy mango mousse, all topped off with plenty of chocolate. I frosted my cake with a thin layer of vanilla buttercream and then added a mouth-watering dark chocolate drip ganache, which just makes the cake looks so festive!
A layer cake with this much filling and decoration requires a bit of planning and preparation. Thankfully, many of the elements can be made in advance, so even though I’m home with our 2 month old baby, I managed to get it all done in time for my birthday! You can save time by buying some of the elements ready-made, such as the macarons and bonbons, if you prefer–but I like to make everything from scratch!
These elements can be made ahead:
Vanilla cake layers can be baked ahead and frozen for up to 3 months. Bake the cake, cut the layers, and freeze them with parchment paper between each layer, wrapped in at least two layers of plastic wrap to keep them fresh. Let the layers thaw in the fridge the night before assembling the cake or assemble it with frozen layers. Either way is fine.
Vanilla buttercream can be made ahead and frozen for up to 3 months. Alternatively, make it up to a week before and store it in an airtight container or a freezer bag in the fridge.
Chocolate macarons can be made up to a month in advance and frozen. You can freeze just the shells or the filled macarons. I prefer the latter so they only need a few hours to thaw before serving.
Caramel-filled bonbons can be made up to a week ahead if stored in an airtight container in a cool, dark place (not the fridge, which is too cold).
Passion fruit curd can be made up to a week before assembling the cake. Store it in an airtight container or a jar in the fridge.
The day before serving, assemble the cake with passion fruit curd and mango mousse. On the day of serving, frost the cake with buttercream, top with dark chocolate ganache, and decorate as desired.
For the perfect cake consistency and stability, it’s crucial to bake your cake layers properly. Flat, even cake layers result in a beautiful, stable cake. The best way to achieve this is to bake one cake and slice it into layers with a bread knife.
With this recipe, you will bake one tall cake that yields four cake layers. In order to bake such a tall cake, you will need an extra tall springform pan or an extra tall adjustable baking ring. Alternatively you can divide the batter evenly into two pans or bake in one pan in batches. If you choose to divide the batter into batches, I recommend weighing the pans with the batter to ensure you get two cakes of the same height.
Here are some tips to baking flat cakes:
Don’t grease the sides of the pan. In a greased pan, the cake will pull away from the sides and shrink a bit, which we want to avoid. Simply line the bottom with parchment paper for easy release.
Use baking strips like the purple ones in the picture to achieve perfectly flat cakes that don’t dome in the middle. Soak the strips in water and secure them around the pan just before baking. They ensure even baking so the cake doesn’t bake faster along the edges and cause a dome in the center.
If you don’t have baking strips, your cake might rise a little in the center. Simply trim any domes off with a bread knife to get a flat cake.
Once the cake is baked, let it cool completely in the pan. Then, run a sharp knife along the inside edge of the pan to release the cake, and remove the pan. Now, you can slice the cake into layers. Score the cake all the way around so you have a guide to follow, then cut through with a bread knife, moving closer to the center until the cake is fully sliced. Repeat with the remaining layers.
How to Ensure a Beautiful Cake Slice
Assemble the cake on your serving dish: Once the cake is assembled, it’s difficult to move and may alter your layers, so assemble it on a serving dish that will fit in the fridge!
Choose a suitable cake ring: When assembling a layer cake with a liquid element like mousse, you need a ring that fits tightly around it to prevent leaks. Use the ring from a tall springform pan or an extra tall adjustable cake ring. I like adjustable rings because they can be tightened around the cake, regardless of its size.
Use cake acetate: I always recommend using cake acetate on the inside of your cake ring. It just gives a cleaner finish, even if you plan to frost the cake later. Place the cake ring with the acetate inside and stack the cake directly on the serving dish.
Place the cut side of the layers up: For example, the layer made from the top part of the cake should be placed so that the top faces down. This ensures the layers are as flat as possible, giving you a cleaner cake slice.
Distribute the filling evenly: If you have elements that go on multiple layers, ensure even distribution. In this cake, passion fruit curd is used on two layers, so I recommend dividing it into equal portions by weight to ensure the layers look the same. Spread the passion fruit curd evenly, just short of the edges, as it will spread out when the next layer is added. Distribute the mousse evenly by gently tapping the form on the counter to remove any air bubbles.
Let the mousse set completely: Make sure the mousse sets completely in the fridge before moving the cake, frosting, and decorating it. It’s crucial for the mousse to set, or the cake will collapse (no pressure!).
Tips for Frosting Your Cake
You can frost your tropical layer cake with icing (such as buttercream) or serve it “naked” for a more rustic look. I chose to frost my cake with a thin layer of vanilla buttercream and topped it with a heavenly drip ganache.
If you’re frosting a cake with buttercream, it’s best to do it in two stages. First, apply a very thin layer, smoothing it evenly on the sides and top. Then, chill the cake until the buttercream sets. This initial layer holds the cake’s filling in place and prevents crumbs from getting into the outer layer of icing. Once the first layer is set, frost the cake again with as thick a layer of icing as you desire, and smooth it out. If you haven’t tried this before, there are plenty of good instructional videos on YouTube.
How to Make Drip Ganache
Dripping chocolate ganache is really easy to make. Dark chocolate ganache consists of just chocolate and heavy cream melted together. I highly recommend using quality chocolate—it makes a world of difference in flavor! I love Callebaut products, so I’ve used Callebaut 811 dark chocolate as usual.
Have all your decorations ready so you can add them while the ganache is still wet. Before pouring the ganache, make sure the cake is chilled. A cold cake will help the ganache set faster. Pour the ganache in the center of the cake so it spreads out to the edges, and then control the drips by adding more ganache at the edges with a spoon. Smooth the top quickly by tapping the cake lightly on the counter or using a palette knife before the chocolate sets.
Tips for Decorating Your Tropical Cake
Now it’s time to decorate! There are so many fun ways to decorate a cake like this.
I decorated my tropical birthday cake with:
Chocolate macarons
Caramel filled bonbons
Small gold chocolate balls
Chocolate buttercream
Purple pansies–to be added only just before serving
A fantastic layer cake with lots of delicious flavors: vanilla, passion fruit, mango, and chocolate. The cake is covered with vanilla buttercream and topped with dripping ganache and plenty of chocolate decorations.
In a large mixing bowl (or stand mixer), beat the eggs with an electric mixer. Gradually add sugar while continuing to beat. Once all the sugar is added, beat for 5 minutes until the mixture becomes thick and creamy (important!).
4 eggs, 350 g sugar
Meanwhile, heat butter and milk in a small saucepan over medium heat until the butter melts (do not boil). Remove from heat and let cool slightly.
110 g butter, 2 ½ dl milk
In a separate bowl, whisk together flour and baking powder. Gradually add the flour mixture to the egg mixture while mixing slowly. Add the melted butter mixture and vanilla, and stir until combined. The batter will be very runny.
250 g flour, 2 tsp baking powder, 2 tsp vanilla
Pour the batter into a 22 cm (9 inch) round pan lined with parchment paper at the bottom. Do not grease the pan. For a perfectly flat cake, wrap wet baking strips around the pan. Alternatively, you can trim the cake top after baking.
Bake for 45-60 minutes or until a toothpick inserted in the center comes out clean and the cake springs back when gently pressed.
Let the cake cool completely in the pan on a wire rack.
Run a sharp knife along the edges and remove the cake from the pan. Slice into four even layers using a serrated knife or a cake leveler. Store the cake layers with parchment paper between them in 1-2 freezer bags until assembling.
Passion Fruit Curd:
Scoop out the passion fruit pulp and strain it through a sieve to remove the seeds. You’ll need 1½ dl passion fruit juice*.
1½ dl passion fruit juice*
In a small saucepan, combine passion fruit juice, sugar, butter, and egg yolks. Heat over low heat while stirring continuously until the mixture thickens (about 10-15 minutes). The curd is ready when it coats the back of a spoon and leaves a trail when you run your finger through it.
100 g sugar, 125 g butter, 100 g egg yolks
Transfer the curd to a bowl and press plastic wrap directly onto the surface to prevent a skin from forming. Refrigerate for at least 3 hours.
Mango Mousse:
Cut mango into small cubes and blend with water until smooth.
4 dl mango purée, ½ dl water
Soak the gelatin sheets in cold water for 10 minutes.
5 sheets gelatin
In a small saucepan, heat mango purée, sugar, and lemon juice until just about to boil. Remove from heat, squeeze excess water from the gelatin, and stir it into the warm mango purée until dissolved. Let cool to room temperature.
50-75 g sugar, 1 tbsp lemon juice
Whip heavy cream to soft peaks. Gradually fold in the cooled mango purée without deflating the whipped cream.
200 ml heavy cream
Assembling the Cake:
Place the bottom cake layer on a serving platter that fits in your fridge. Wrap an adjustable cake ring or springform ring lined with acetate tightly around it.
Spread half of the passion fruit curd evenly over the cake layer. Place the second cake layer on top and gently press down.
Spread the mango mousse evenly over the layer (max 2 cm / 3/4 inch thick; you may have leftover mousse). Place the third cake layer on top and gently press down.
Spread the remaining passion fruit curd evenly over it. Add the final cake layer and gently press down.
Cover the cake with plastic wrap and refrigerate for at least 6 hours (preferably overnight) to allow the mousse to set.
Buttercream:
Cut butter into pieces and place in a large mixing bowl or stand mixer. Beat until creamy and fluffy.
450 g butter
Gradually add powdered sugar in three additions while mixing.
1000 g powdered sugar
Add heavy cream and vanilla. Adjust consistency and flavor by adding more cream if needed.
120 ml heavy cream, 5 tsp vanilla
Transfer the buttercream to a piping bag with a wide flat nozzle or spread it directly with an offset spatula.
Remove the cake from the fridge. Carefully remove the cake ring and acetate. Place the cake on a turntable. Spread a thin crumb coat of buttercream over the cake. Use an offset spatula or scraper to smooth the sides and top.
Chill the cake until the buttercream firms up. Apply another thin layer if needed for a smoother finish.
Mix cocoa powder into the leftover buttercream for decorating later.
4-5 tbsp cocoa powder
Dark Chocolate Ganache and Decoration:
Chop the dark chocolate and place it in a microwave-safe bowl with heavy cream. Heat in 15-20 second intervals, stirring between each, until melted and smooth.
100 g quality dark chocolate, 100 ml heavy cream
Remove the cake from the fridge and pour the ganache onto the center, letting it run towards the edges of the cake. Use a spoon to push some ganache over the sides to create drips. The cold cake will set the ganache quickly.
Decorate the cake before the ganache fully sets. Refrigerate the cake afterward, covered with plastic wrap. Fresh flowers should only be added just before serving.
Remove the cake from the fridge at least 1 hour before serving for the best taste and texture.*15-17 passion fruits yield about 1 ½ dl (3/4 cup) juice.
400 g (14 oz) mango + ½ dl (1/4 cup) water = approx. 4 dl (1 3/4 cup) mango purée.
See tips for making elements in advance earlier in the post.
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Hi, I’m Trine – home baker from Copenhagen, Denmark. “Bageglad” means happy to bake in Danish and I have been spreading this happiness on the blog since 2012. Today, it reaches more home bakers worldwide than I could ever have dreamed of! Thank you for visiting!
Hi, I’m Trine – home baker from Copenhagen, Denmark. “Bageglad” means happy to bake in Danish and I have been spreading this happiness on the blog since 2012. Today, it reaches more home bakers worldwide than I could ever have dreamed of! Thank you for visiting!
Difficulty: Moderate
Yield: 14 servings
