White chocolate mousse cake with blueberries
I made this cake with white chocolate mousse and blueberries when I needed a festive dessert that wasn't too complicated. I managed well, even though I don't have much experience with mousse cakes. I think it has a good balance between the light sponge, the smooth cream, and the blueberry flavor. A good part is that you can adapt the decoration depending on how much time and desire you have. Quick info Total time: about 3.5–4 hours (including cooling) Preparation time for sponge: 20 minutes Baking time for sponge: 35 minutes Preparation time for mousse and assembly: 30–40 minutes Cooling time for mousse: at least 2–3 hours (ideally overnight) Servings: 10–12 slices, for a 26 cm round pan Difficulty: medium, requires patience Recipe type: celebration cake, suitable for birthdays or special occasions Ingredients Sponge: 8 eggs 8 tablespoons sugar 11 tablespoons flour 1 packet vanilla sugar 1 teaspoon baking powder 3 tablespoons cocoa 1 pinch of salt Mousse cream: 600 g liquid cream (separate: 300 g for mixing, 300 g for melting chocolate) 300 g white chocolate (choose a good one, not with vegetable fats) 1 packet gelatin 1 jar blueberries, about 300 g (can also be from compote/syrup) Sugar paste (optional, for decoration): 1 tablespoon gelatin 6 tablespoons water 1 tablespoon butter or margarine 2 tablespoons honey powdered sugar (as needed, until you get a firm paste) Preparation method 1. Sponge 1. Break the eggs and separate the egg whites from the yolks. 2. Beat the egg whites with a mixer until they form a foam. Gradually add the sugar, one tablespoon at a time, continuing to mix until a stiff meringue forms. 3. In a separate bowl, mix the yolks with a pinch of salt. 4. Add the yolks over the beaten egg whites and gently fold in with large movements, so as not to lose volume. 5. Gradually incorporate the baking powder, vanilla sugar, and cocoa, mixing from the bottom up. Finally, add the sifted flour and gently homogenize everything without overmixing. 6. Prepare a 26 cm round pan with parchment paper at the bottom. 7. Pour the mixture into the pan, level it, and bake in a preheated oven at 180°C for about 35 minutes. Check if the sponge is baked with a toothpick. 8. Remove the sponge from the pan and let it cool completely on a wire rack. 2. White chocolate and blueberry mousse cream 1. Whip 300 g of liquid cream until you get a firm foam. Refrigerate. 2. In a separate pot, heat the other 300 g of cream over low heat and add the broken white chocolate. Stir frequently, without letting the cream boil. When the chocolate has completely melted, remove from heat. 3. Hydrate the gelatin in a little cold water, according to the instructions on the packet (usually 5–10 minutes). 4. Add the hydrated gelatin to the warm cream and chocolate mixture, stirring until completely dissolved. 5. Let the mixture reach room temperature. 6. Gradually fold the completely cooled chocolate mixture into the whipped cream, stirring gently with a spatula. 7. Add the drained blueberries (you can keep the juice for syrup). 8. Place the cream in the refrigerator for at least 2 hours to set. 3. Cake assembly 1. Cut the cooled sponge into 3 equal layers. 2. If you have blueberry syrup (from the jar or quickly make a syrup from blueberry juice + a little sugar + water), soak each layer well. 3. Place the first layer on a platter, spread a layer of mousse. Continue with the next layer, another layer of mousse, then the last layer. 4. Keep some of the cream to cover the cake on the outside. 5. Refrigerate the cake for at least 1 hour before decorating. 4. Sugar paste (only if you want to cover it) 1. Mix the gelatin with the water and let it hydrate for a few minutes. 2. Place the mixture over a double boiler until it becomes liquid. 3. Add the butter and honey, mixing until homogeneous. 4. Sift the powdered sugar two to three times, then gradually add it to the liquid mixture, mixing until you can no longer mix with a spoon. 5. Turn it out onto the table and knead until you get an elastic paste that doesn't stick. 6. Roll out a thin sheet and carefully cover the cake, smoothing it to avoid air bubbles. 7. The rest of the paste can be used for flowers or other decorations. Why I often make this recipe It's the kind of cake that doesn't give you too much anxiety, as long as you follow the steps. The sponge is simple and doesn't dry out easily. The cream isn't heavy, even though it has chocolate. It keeps well in the refrigerator and is easy to adapt if you want other fruits. I can make it in advance, which helps me when I have guests. Tips and variations Tips - Whip the cream cold, otherwise it won't set. - When adding gelatin, the chocolate mixture should be warm, not hot. - Let the sponge cool completely so that the mousse doesn't melt during assembly. - If you don't have sugar paste, you can just finish it with the leftover cream and a few blueberries on top. Substitutions - You can use raspberries or mixed berries instead of blueberries. - Gelatin can be in sheets or granules, following the instructions on the package. - If you don't have quality white chocolate, the result may be sweeter or harder to work with. Variations - Instead of sugar paste, the cake can be covered with white chocolate ganache or simple buttercream. - For a more aromatic syrup, add a little blueberry or orange liqueur to the syrup for the sponge. - If you want a rustic look, leave the cake with just mousse on the outside and fresh fruit. Serving ideas - Cut the cake cold, with a knife dipped in hot water. - It also goes well with a fruit sauce alongside the slice, for an extra freshness. - You can make it a day in advance; it keeps its texture and flavor well. Frequently asked questions 1. What do I do if I don't have a 26 cm pan? You can use a 24 or 28 cm one, but the sponge will be a little taller or thinner. Adjust the baking time if necessary. 2. Can I use plant-based cream? Yes, but the taste and texture will be slightly different compared to natural cream. 3. How do I prevent the mousse from cutting? It's important that the chocolate and gelatin mixture is completely cooled before incorporating it into the whipped cream. 4. The sponge sank after baking. Why? This often happens if you overbeat the mixture after adding the flour or if you open the oven during baking. 5. What can I do if I don't want sugar paste? You can decorate the cake with mousse and fruit or with some grated chocolate. Nutritional values (estimate, per slice from 12) Approx. 370–400 kcal Carbohydrates: 40–45 g Proteins: 6–8 g Fats: 20–23 g These are just estimates; values may vary depending on the type of cream, chocolate, and the amount of sugar used in the paste or syrup. Storage and reheating The cake keeps in the refrigerator, covered, for up to 3 days. It should not be reheated and freezing is not recommended, as the mousse loses its texture. You can also keep any leftover sugar paste, well wrapped, in the fridge for up to 2 weeks.
Preparation
THE BASE: We start by separating the egg whites from the yolks. The egg whites are whipped until foamy and gradually one tablespoon of sugar is added. The yolks are mixed with a pinch of salt and then added to the egg whites, folding gently. Baking powder, vanilla, and cocoa are added and mixed lightly until the composition is homogeneous, and finally, flour is added. The mixture is poured into a round baking pan with a diameter of 26 cm, after placing parchment paper at the bottom of the pan. It is baked for about 35 minutes or until a toothpick test comes out clean. Once the base is baked, it is removed from the pan and left to cool while the cream is prepared. CREAM: Half of the whipped cream (300 g) is whipped well. The chocolate is melted in the remaining 300 g of cream heated over low heat. Be careful, the cream should not boil. The gelatin is hydrated in a little water and then added to the warm chocolate, mixing until dissolved. This mixture is allowed to cool completely and then poured into the whipped cream. It is mixed well, and blueberries are added, then placed in the refrigerator. After the base has cooled, it is cut into 3 equal thickness slices, soaked well with blueberry syrup, and cream is placed between the slices. Be careful, not all the cream is placed inside the cake; some is reserved to cover the outside with cream. The next step depends on each person's imagination and desire, whether to leave the cake decorated only with cream and possibly some chocolate, or to cover it with fondant. I chose the fondant option, which I prepared as follows: Gelatin is mixed with water, placed over a double boiler, and when warm, butter and honey are added and mixed until a homogeneous paste is formed. The sugar is sifted, and the prepared paste is added, mixing until it becomes a thicker paste, and we notice that the spoon can no longer be used. To knead the fondant more easily, the entire mixture is poured directly onto the table and kneaded like regular dough until it becomes elastic and no longer sticks to the table. It is rolled out into a thin sheet like any dough, and the cake is covered with it, taking care to avoid air bubbles between the paste and the cake. Depending on preference, it is decorated with flowers made from the fondant as well. The sugar is sifted very well, even 2-3 times, to ensure the paste's texture is as fine as possible. If the sugar contains larger crystals, it cannot be rolled out or used to make decorations, it must be crushed.
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