• Sharon To

Strawberry Mousse Cake


Top view of strawberry swirl mousse cake

Love is in the air, and so is the sweet scent of strawberries! To celebrate this month of love, I decided to make a sweet and beautiful strawberry mousse cake! This recipe was inspired by this matcha mousse cake recipe, so this recipe’s ingredients are provided by weight. I provided the closest US customary units to the weight equivalent for anyone who prefers that, but remember that they are estimates and weight will always be more accurate!


The Ingredients

Milk, cream, sugar, cream cheese, gelatin powder, pink food coloring, strawberry extract, salt, oil, cake flour, eggs

For this recipe, to create the strawberry flavor and look, I used a combination of strawberry extract and pink food coloring. I didn’t try using strawberry puree in this recipe, but that would definitely be a yummy alternative!

I also never have cake flour, so instead of using cake flour, I made my own using all-purpose flour and cornstarch. The specific ratio for this recipe was 52g of all-purpose flour to 8g cornstarch. You can also prepare a cup of cake flour by measuring out 1 cup of all-purpose flour, removing 2 tbsp, then adding 2 tbsp of cornstarch, then using however much you need. If you’re going to make your own cake flour, make sure it’s evenly mixed! I like to sift at least 2 times, but the more the better!


For the gelatin, I used gelatin powder because that was what was available at my grocery store, but depending on your location you may have gelatin sheets available to you instead. In that case, two gelatin sheets should be enough.


The Baking Process

Starting off with the cake layer, the recipe is fairly straightforward. The merengue in this cake batter requires soft peaks. The original recipe offered a tip for getting more consistent merengue by first beating the egg whites on low heat, increasing it to high, then decreasing it back to low until the peaks are soft and glossy. When you fold the egg whites and the egg yolk batter, you’ll want to make sure you don’t overmix so that the batter can stay light and airy.

If you’re using a mousse ring, you’ll want to bake the cake on a sheet pan lined with parchment paper, then when the cake is finished baking, remove it immediately from the sheet pan and cool it on a cooling rack. I used a springform pan, so I baked the cake in the ungreased pan, and when the cake was finished, I flipped the pan over on top of a cooling rack to prevent the cake from deflating while it cooled. I may have waited a little too long to flip the pan over because I noticed that the cake did deflate a little, but not by too much.


Pink chiffon cake batter in a springform cake pan prior to baking

Now came time to prepare the mousse. As I mentioned in the ingredients section, if your area doesn’t have gelatin powder, you can use gelatin sheets, which you’ll want to soak in hot water before using. If you’re using gelatin powder you can just put it straight into the hot milk. The cream cheese will also need to be room temperature so that it isn’t chunky when mixed.

Five bowls of mousse paste at increasingly concentrated colors of pink
Tried keeping the mousse paste warm in a hot water bath (bottom right)

When splitting the mousse into batches for coloring, you can split it into as many batches as you want levels of color with each batch having less mousse and a higher color concentration, but I went with five levels. The main challenge here was keeping the consistency of the mousse smooth. The longer the mousse sits out, or the colder the temperature, the more quickly the mousse will start to congeal, which will make it harder to spread on the cake. The ideal consistency should be fairly liquid so that it can be easily poured on top of the cake and evenly spreads out. If you find that your mousse is thicker you can microwave the mousse in the microwave for about 5-10 seconds and give it a light mix before pouring it onto the cake. I initially tried keeping the mousse warm in a hot water bath, but found that the microwave had better results.


Top view of mousse cake

After all the mousse has been poured the cake will need to be refrigerated for at least 4 hours so the mousse can set, though keeping it cooled overnight would be preferred.

To remove the cake from the mold, I used a hairdryer to warm the sides, essentially melting the mousse just enough so that the edges of the cake pan can be separated from the cake. It’s because of this step that I would say a mousse ring/cake ring would be the ideal way to make this cake. The mousse ring allows you to have the chiffon cake removed from the baking sheet immediately and placed on whatever cake plate you want to use and is easy to slide off the cake after the edges have been warmed. I used a springform pan and at this step was pretty nervous about ripping the mousse. After I warmed up the sides of the pan, I slowly pulled the spring latch open, checking the edges closest to the opening to make sure it wouldn’t get pulled along with the pan edges. At first it didn’t seem melted enough, so I re-clasped the latch and used the hairdryer a little longer, and continued testing it a bit to make sure the edge could be removed clean.


The Results

3 slices of layered strawberry mousse cake with a slice of strawberry on top of each slice

This cake came out fantastically! I’ll be honest, the first two layers were a bit too thick when I added them to the cake, so the first two layers were not so evenly distributed. But with the remaining three layers, I used the microwave trick to get them to the right consistency and they spread out nicely. But even with that little hiccup, the cake still turned out looking great!


And the flavor and texture were even better! I loved how light and airy the chiffon cake turned out, and the way the light strawberry flavor made it feel like I was eating a pink cloud. I honestly might use this recipe for all my cakes in the future! As for the mousse, I loved its smooth texture. The cream cheese flavor is quite strong and really stood out, so I would add more strawberry extract to the mousse the next time around, and I may consider swapping it out with mascarpone cheese since I think that has a bit lighter of a flavor.

This cake was soo yummy, lightly sweet, and fruity! It makes for a perfect dessert to show someone just how much you love them!


 

Strawberry Mousse Cake

Ingredients

Cake

ºoº 3 eggs

ºoº 60g (1/3 cup) granulated sugar

ºoº 25g (1 3/4 tbsp) avocado oil (or oil of choice)

ºoº 1 tsp strawberry extract

ºoº 1-2 drops pink food coloring

ºoº 60g (1/4 cup) milk

ºoº 60g (1/2 cup) cake flour

ºoº Pinch of salt


Mousse

ºoº 12g (1 1/2) gelatin packets

ºoº 1/2 tbsp strawberry extract

ºoº 187.5g (3/4 cup) milk

ºoº 105g (1/2 cup) granulated sugar

ºoº 150g (2/3 cup) cream cheese (room temperature)


Directions

Cake

  1. Preheat the oven to 356F

  2. Separate the egg whites and egg yolks

  3. Add a little bit of the granulated sugar to the egg yolks and mix it together

  4. Slowly incorporate the oil into the egg yolk while whisking

  5. Add the strawberry extract and pink food coloring to the milk

  6. Mix the strawberry milk mixture into the egg yolks and mix until evenly combined

  7. Sift the cake flour into the egg yolk mixture in batches until thoroughly combined in a thick mixture

  8. Add the remaining sugar to the egg whites and beat until you have soft peaks

  9. Add 1/3 of the egg whites into the flour batter and fold until evenly mixed

  10. Now add all the batter into the egg whites and fold until evenly mixed. Make sure to scrape the bottom!

  11. Pour the batter into an ungreased cake pan with a removable bottom. If you don’t have one, you can bake the cake on a sheet pan lined with parchment paper and will need a mousse/cake ring

  12. Bake the cake for 15 minutes

  13. Take the cake out and immediately cool upside down on a cooling rack. This will help with preventing the cake from deflating

Mousse

  1. Microwave the milk until hot (about 60 seconds)

  2. Mix the gelatin into the hot milk until fully dissolved. If you still see chunks you can microwave the milk again in 10-15 minutes increments and continue mixing until it’s all dissolved

  3. Add the warm water gelatin to the cream cheese and mix until evenly combined

  4. Mix in the sugar and strawberry extract until it’s all dissolved. Optionally, for a smoother consistency filter the mixture through a sieve

  5. Whip the heavy whipping cream until the surface has a texture, but is not fully thickened

  6. Pour part of the cream cheese mixture into the cream and mix evenly. Then pour the rest of the cream cheese mixture in and mix

  7. Separate the mousse into four bowls for the four different levels of coloring. The recommended batches from most concentrated to least is [1] 90g (1/3 cup), [2] 120g (1/2 cup), [3] 150g (2/3 cup), and [4] 150g (2/3 cup). You should have roughly 180g (3/4 cup) leftover that will not be colored.

  8. Add 4 drops of food coloring in batch [1], 3 drops of food coloring in batch [2], 2 drops of food coloring in batch [3], and 1 drop of food coloring in batch [4] and mix them all until evenly incorporated. Additionally you can add some extra drops of strawberry extract if you want a stronger flavor

Assembly

  1. In the cooled cake pan, pour the uncolored batch of mousse paste until it covers the cake. From lightest to darkest, pour each mousse paste batch in the center of the cake. ** The mousse paste should be relatively thin and each batch should have a similar consistency, otherwise it will not spread evenly on top of the cake. See notes for how to handle congealing mousse paste **

  2. After all the mousse is poured, add any design you like or allow the mousse to stay in concentric circles, and refrigerate for at least 4 hours to allow the mousse to set (overnight preferred)

  3. Remove from the refrigerator and slowly and evenly heat the edges of the cake pan with a hair dryer to loosen the sides

  4. When the edges are warmed and the edges feel loosened, remove the cake from the mold. If you are using a springform, carefully loosen the spring clasp

  5. Slice and enjoy!



Notes:

ºoº The cream cheese can be substituted with mascarpone cheese

ºoº If using cream cheese, make sure it is at room temperature, otherwise mixing it will

leave you with lots of chunks

ºoº Cake flour can be made using 52g of all-purpose flour and 8g of corn starch well

mixed and sifted

ºoº Depending on the ambient temperature or how long your preparation takes, your

mousse paste may start to thicken. To keep it warm you can keep the bowls of mousse

paste in a hot water bath to keep the paste loose, or microwave the batch you’re

about to use for about 5-10 seconds until it thins but is not too hot

ºoº When you’re heating the edges of your pan to remove the mousse cake, be careful not

to heat it too hot or the mousse may start to melt again


 

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