Galaxy Mousse Cake is a stunning, celestial-inspired dessert that combines a velvety mousse with a mesmerizing galaxy glaze. This cake is perfect for special occasions, impressing guests with its vibrant, swirling colors and luxurious texture. Whether you are an experienced baker or a beginner, this recipe will guide you in creating a masterpiece that looks as incredible as it tastes.

Why You’ll Love This Recipe

A visually breathtaking dessert that resembles a galaxy.
Smooth, creamy mousse combined with a soft cake base.
The galaxy glaze creates a professional and artistic finish.
Customizable colors and flavors to suit any occasion.
Perfect for birthdays, parties, and themed events.

Ingredients

(Tip: You can find the complete list of ingredients and their measurements in the recipe card below.)

For the Cake Base:

All-purpose flour
Granulated sugar
Eggs
Butter
Baking powder
Vanilla extract

For the Mousse:

Heavy cream
White chocolate
Gelatin sheets or powder
Sugar
Milk
Vanilla extract

For the Galaxy Glaze:

Sweetened condensed milk
White chocolate
Gelatin
Water
Sugar
Food coloring (blue, purple, pink, and black)

Directions

Step 1: Prepare the Cake Base

Preheat the oven to 350°F (175°C) and grease a round cake pan.
In a mixing bowl, whisk together eggs and sugar until fluffy.
Add melted butter and vanilla extract, mixing well.
Sift in the flour and baking powder, then fold gently until combined.
Pour the batter into the prepared pan and bake for 20-25 minutes or until a toothpick inserted in the center comes out clean.
Let the cake cool completely.

Step 2: Make the Mousse

Bloom the gelatin by soaking it in cold water for a few minutes.
In a saucepan, heat milk and sugar until warm (do not boil).
Add the bloomed gelatin and stir until dissolved.
Melt the white chocolate and mix it into the milk mixture.
Whip the heavy cream to soft peaks and gently fold it into the chocolate mixture.
Pour the mousse over the cooled cake base and refrigerate for at least 4 hours or until set.

Step 3: Prepare the Galaxy Glaze

Bloom the gelatin in cold water.
In a saucepan, heat sugar, water, and condensed milk until well combined.
Add the white chocolate and mix until melted.
Stir in the bloomed gelatin and mix until smooth.
Divide the glaze into separate bowls and add different food coloring to each.
Swirl the colors together and pour the glaze over the chilled mousse cake.

Step 4: Set and Serve

Let the glaze set in the refrigerator for 1 hour.
Carefully transfer the cake to a serving plate.
Slice and serve your galaxy-inspired mousse cake.

Servings and Timing

Servings: 8-10 slices
Preparation time: 45 minutes
Cooking time: 25 minutes
Chilling time: 5 hours

Variations

Flavor Options: Add fruit puree (like raspberry or mango) to the mousse for a fruity twist.
Dark Chocolate Mousse: Replace white chocolate with dark chocolate for a richer taste.
Different Colors: Experiment with neon, pastel, or cosmic color themes.
Gluten-Free Option: Use almond flour or gluten-free cake mix for the base.

Storage/Reheating

Store the cake in the refrigerator for up to 3 days, covered to prevent drying out.
Freezing is not recommended for the galaxy glaze, but the mousse can be frozen for up to a month before glazing.
If refrigerated, let the cake sit at room temperature for 10 minutes before serving.

FAQs

How do I get a smooth galaxy glaze?

Ensure the glaze is at the right temperature (around 90°F or 32°C) before pouring. If it’s too hot, it will melt the mousse, and if too cool, it won’t spread properly.

Can I use store-bought cake mix for the base?

Yes, a boxed vanilla or chocolate cake mix will work as a shortcut.

What type of food coloring is best?

Gel food coloring works best as it provides vibrant colors without thinning the glaze.

Can I make this cake in advance?

Yes, you can prepare the cake and mousse a day in advance, then glaze it on the day of serving.

How do I store leftover glaze?

Leftover glaze can be refrigerated and reheated gently before use. Avoid overheating, as it can affect the consistency.

Can I make this without gelatin?

You can substitute agar-agar for gelatin, but the texture may slightly differ.

Why is my glaze not shiny?

A dull glaze could be due to incorrect pouring temperature or overmixing the colors.

How do I create a perfect galaxy effect?

Pour different colors at the same time and use a spatula to create swirls gently.

Can I add edible glitter or stars?

Yes, edible glitter, silver sprinkles, or gold leaf will enhance the galaxy look.

Is this cake very sweet?

The sweetness depends on the white chocolate and condensed milk. You can adjust by using less sugar in the mousse.

Conclusion

Galaxy Mousse Cake is a show-stopping dessert that combines art with flavor. With its creamy mousse, delicate cake base, and mesmerizing galaxy glaze, this cake is a treat for both the eyes and the taste buds. Whether for a birthday, a space-themed party, or just a special occasion, this cake will surely impress. Try it out and bring a piece of the universe to your dessert table.

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This Galaxy Mousse Cake is a mesmerizing dessert with vibrant layers of airy mousse atop a buttery crust. Perfect for special occasions, this no-bake treat is both visually stunning and delicious!

Author: Emma Harper
Prep Time: 30 minutes
Cook Time: 6 hours
Total Time: 6 hours 30 minutes
Yield: 8 servings 1x
Category: Dessert
Method: Baking
Cuisine: Italian

Instructions

Prepare the Crust: Mix crushed graham crackers with melted butter and press into a springform pan. Chill for 30 minutes.
Make the Mousse: Beat cream cheese, sugar, and melted white chocolate until smooth.
Prepare Gelatin: Dissolve gelatin in warm water, then mix into the cream cheese mixture.
Whip the Cream: Beat heavy cream until stiff peaks form, then fold into the mousse mixture.
Create Layers: Divide into bowls, add different food colorings, and layer into the pan. Swirl lightly for a galaxy effect.

Chill & Decorate: Refrigerate for 4-6 hours. Decorate with edible gold beads and drizzle.

Notes

Use natural food coloring for a healthier option.

Swap graham crackers for Oreo crumbs for a richer base.