This Berry Mousse Cake is an easier take on a classic Charlotte Russe cake. Layers of soft Genoise sponge cakes are topped with a homemade berry jam and filled with a mixed berry mousse filling.
Prep Time40 minutesmins
Cook Time25 minutesmins
Cooling Time4 hourshrs
Total Time5 hourshrs5 minutesmins
Course: Dessert
Cuisine: American
Keyword: Genoise, Layer Cake, Mixed Berry, Mousse, Standard Size Cake
1/2cupseedless mixed berry jam (raspberry or blackberry works if you cannot find mixed berry)
Genoise Cake
4tablespoonsunsalted butter, melted and cooled slightly
1 and 1/4cupscake flour
3/4cupgranulated sugar
1/4teaspoonsalt
5largeeggs, room temperature
1teaspoonvanilla extract
Instructions
Mousse Filling - Part 1
In a large bowl, sprinkle the gelatin over the water and set aside.
In a medium bowl, whisk the egg yolks and cornstarch until combined.
In a medium saucepan, combine the fruit, sugar, butter, and salt. Mash with a whisk and stir until no dry sugar remains. Cover over medium heat, whisking frequently until mixture is simmering and the fruit is almost completely broken down - about 4 - 6 minutes.
Temper the eggs to make berry curd - Remove the fruit mixture from the heat and while whisking constantly, slowly stream about half of the fruit into the egg yolk mixture to temper. Whisking constantly, return the tempered egg mixture to the remaining fruit mixture in the saucepan. Return the saucepan to medium heat and continue to whisk and cook until the mixture thickens and bubbles - about 1 minute.
Strain the fruit mixture through a fine-mesh strainer set over the gelatin mixture. Press on the fruit solids with a spatula or the soup ladle until only the seeds remain. Scrape the underside of the strainer to make sure all of the strained fruit is in the bowl. Discard seeds and stir the fruit mixture with the gelatin until the gelatin is dissolved.
Set aside, stirring occasionally, until the curd is lightly thickened and reaches room temperature - at least 30 minutes or up to 1 and 1/2 hours.
Jam
In a small bowl, sprinkle the gelatin over the lemon juice. Let sit until the gelatin softens - about 5 minutes.
In a microwave-safe dish, microwave the jam whisking occasionally, until the jam is hot and fluid - about 30-60 seconds. Add softened gelatin to jam and whisk until dissolved and set aside.
Genoise Cake
Adjust oven rack to middle position and preheat the oven to 350F degrees. Lightly grease 2, 8-inch round cake pans. Fit the bottom of each with a piece of parchment paper. Grease and flour the the pans.
On a piece of wax paper, sift the cake flour. Return the sifted flour to the sifter and add 1 tablespoon of the sugar and sift back onto the wax paper. Set aside.
In a medium microwave-safe bowl, melt the butter in the microwave - about 20 seconds. Set aside.
In the mixing bowl of a stand mixer, add the eggs and remaining sugar. Use the whisk attachment from the mixer to combine the ingredients by hand first.
Attach the whisk attachment to the stand mixer and mix the eggs on medium speed until the batter is airy, pale and has tripled in volume (it will resemble soft whipped cream) - about 4-5 minutes. You will know that the eggs are properly whipped when you lift the whisk and the batter falls back into the bowl in a 'ribbon' that rests on the surface for about 10 seconds. If the 'ribbon' immediately sinks to the mixture, continue to whip for a few more minutes. Add the vanilla extract during the last moments of mixing.
Detach the mixing bowl from the mixer. Sprinkle about 1/3 of the flour mixture over the batter. Using a rubber spatula, very gently fold in the flour stopping as soon as the flour is incorporated.
In 2 more additions, sprinkle and gently fold in the remaining flour.
Temper the butter - Spoon about 1 cup of the batter into the bowl of melted butter. Using the rubber spatula, fold the butter into the batter. Then transfer this mixture back to the batter in the mixing bowl and very gently, fold until incorporated. The batter is extremely fragile at this point, so be sure to fold very, very gently so the eggs do not deflate.
Carefully pour the batter into the prepared baking pan and smooth the top with the rubber spatula. Bake immediately for 25-27 minutes, or until the top springs back when lightly touched, and the cake starts to come away from the sides of the pan.
Transfer the cake to a cooling rack and let it cool in the pan for 5-10 minutes.
To remove the cake from the pan, test if it is ready first. Gently tap the pan on the countertop. If the cake does not appear to release from the sides of the pan, run a knife around the outside of the cake. Invert the cake onto the cooling rack and remove the pan and slowly peel off the parchment paper. Cover the cake with another cooling rack and invert again. Let the cake cool completely right side up.
Mousse Filling - Part 2
Using a stand mixer fitted with the whisk attachment, or a handheld mixer, mix the heavy cream until soft peaks form.
Transfer 1/3 of the whipped cream to the fruit filling. Whisk gently until the mixture is lightened. Fold in the remaining whipped cream with a spatula, until fully incorporated and no whipped cream streaks remain.
Assembling the Cake
Set one layer of cake on a cake platter. Spread half of the jam mixture on top of the cake all the way to the edges. Next, take half of the mousse and spread on evenly to the edges. The mousse will be sturdy and should be spread on thick. Top with the second cake layer and spread on the remaining jam. Top with the remaining mousse and smooth out the top, and any mousse the spilled out of the sides, with an offset spatula or the back of the spoon.
Refrigerate the cake for at least 4 hours, or up to 24 hours, to allow the mousse to set. Serve the cake at room temperature. Enjoy!
Notes
Preparation Tips
Read ALL of the ingredients and instructions first - Before you even get started, you will want to make sure you know what step to expect next.
Gather everything you need for each part of the cake first - Have all of your ingredients, equipment, and instructions in an accessible place. There is nothing more frustrating when you have to run around the kitchen mid-preparation to get what you need.
Make the jam ahead of time if you can - Jam can be refrigerated days ahead of time.
Mousse Filling Tips
The mousse starts out as a berry curd - The berries will get cooked down with sugar. Then they get mixed with egg yolks and cornstarch, which makes a berry pudding. What makes the filling a mousse is the addition of whipped cream to the berry pudding.
Take your time - The mousse filling is probably the most laborious part of this recipe. I make the the first part of the mousse filling - cooking down the berries - after I make the jam (if I make the jam the same day). This allows the cooked berries to come to room temperature. And it is ok if it sits for while you prepare the next steps.
Part 2 of making the mousse filling - Make and fold in the whipped cream into the cooked berries while the cakes bake and cool. Now that the cakes are in the oven, your stand-mixer is available to make the whipped cream!
Cake Tips
Use cake flour - The finer consistency of cake flour makes for a tender crumb. Although, if all you have is all-purpose flour, that should work fine.
Sift the flour - This is a must for a smooth and silky batter. And yes, sift it twice.
Room temperature eggs - Eggs whip up better when they are at room temperature.
Take your time - Whipping the eggs to ribbon stage will take a few minutes. The eggs triple in size and the mixture will look like a loose whipped cream. And when you lift the whisk out of the batter, the strands of batter that fall will look like ribbons sitting on top of the batter.
GENTLY fold in the flour - We don't want to waste all that time it took to get the air into the eggs! So, carefully fold the flour into the egg batter.
Don't skip adding a LITTLE of the batter into the butter - This step essentially 'tempers' the melted butter so it doesn't deflate the batter.