Galaxy cake

Step into another world with this galaxy-themed bar cake with fudgy chocolate, salted caramel and Mars. The rich and decadent layers of chocolate are perfectly balanced with a delicious layer of salted caramel for a delightful touch of sweetness. Garnished with colorful galaxy decorations, this cake is not only a treat for the taste buds but also a visual delight.

This celestial creation is ideal for stargazers and children alike as it stimulates their imagination and takes them on a cosmic journey with every bite. Whether for a special occasion or simply to enjoy a heavenly dessert, the galaxy cake will impress both in terms of appearance and taste.


  • 250g unsalted butter
  • 200 g dark chocolate (70% cocoa content)
  • 350g light, soft brown sugar
  • 200g self-raising flour
  • 1 tsp baking soda?
  • ½ tsp salt
  • 4 large eggs
  • 300 ml cup of sour cream
  • 100 ml strong hot coffee (double shot of espresso)
  • 250g bag of fun size mini Mars bars
  • 397g can of Nestlé Carnation Caramel
  • 1 tsp sea salt flakes
  • 400g unsalted butter, softened at room temperature
  • 800g powdered sugar
  • 2 tsp vanilla bean paste
  • 4 tbsp whole milk
  • black, blue, purple and green food coloring gel
  • navy blue and silver luster dust
  • edible metallic pearly white color
  • silver pearl balls
  • thin brush
  • cake scraper


Freeze the cakes

You can bake the sponge cake bases in advance and freeze them well covered. You can even decorate them from frozen as this makes the buttercream easier to work with.

Where to buy

We purchased all of the edible decorating ingredients on Amazon.


Feel free to change the decorations as you like, use different colors, whatever you like. When it comes to creating a galaxy, the possibilities are endless.

Preparation steps

  1. Preheat the oven to 180°C/160 fan/gas mark 4.
  2. Grease and fill two springform pans with a depth of 20 cm.
  3. Melt the butter and chocolate in the microwave on high in 30 second increments until shiny and smooth.
  4. Alternatively, you can melt the butter with the chocolate in a bowl over a pan of simmering water. Allow to cool slightly.
  5. In a large bowl, mix together the sugar and flour, removing any lumps with your fingertips.
  6. Stir in bicarb and salt.
  7. In a separate jug, whisk the eggs with the sour cream.
  8. Add the egg mixture to the dry ingredients and stir until well combined.
  9. Add the cooled chocolate mixture and beat until a smooth chocolate batter forms.
  10. Stir in the hot coffee.
  11. Divide the mixture between the tins and bake for 40-45 minutes, until a skewer inserted into the center comes out clean.
  12. Allow the cakes to cool in the pans for 10 minutes, then transfer to a wire rack to cool completely.
  13. While the cakes are cooling, prepare the buttercream.
  14. Using a mixer or electric whisk, beat the butter with confectioners’ sugar, vanilla, and a pinch of salt for 10 minutes until very light and fluffy.
  15. Stir in the milk and set aside.
  16. Cut each of the cooled cakes in half.
  17. Break the Mars bars into small pieces and stir the sea salt into the caramel.
  18. Place the cakes together, placing a third of the caramel and Mars mixture between each layer. Leave the top layer free for the glaze.
  19. Spread a layer of white buttercream over the entire cake and then let it set in the fridge.
  20. Divide the remaining buttercream between 4 bowls and color each with black, blue, green and purple food coloring.
  21. Using a spatula, apply some of each colored buttercream randomly to the cake.
  22. Go around the sides with a cake scraper to blend the colors and smooth the cake.
  23. Continue applying buttercream in different colors until you achieve the galactic look you want.
  24. Dot areas with navy and silver luster dust to create a moonbeam effect around the cake.
  25. Using a brush and white pearl paint, draw groups of stars and dots inside silver balls in a random or coordinated pattern to your liking.

Nutritional Information

Equipment and tools

  • mixing bowls
  • Electric mixer
  • spatula
  • Whisk
  • Measuring cups and spoons
  • Cake pans
  • baking paper
  • Refrigerated shelves
  • saw knife
  • Piping bag
  • Star-shaped piping tip
  • Cake turntable
  • Palette knife
  • Paint brush

Allergen information

This galaxy cake contains the following allergens:

  • butter
  • Chocolate
  • Eggs
  • Flour
  • Dairy products (sour cream, Nestlé Carnation Caramel, buttercream)

Please ensure these ingredients are suitable for your dietary needs and make substitutions or omissions if necessary.

Storage and leftovers

After baking and decorating, this galaxy cake can be stored in an airtight container at room temperature for up to 3 days. It can be stored in the refrigerator for up to 5 days. To keep the cake fresh longer, you can also freeze it by wrapping it tightly in plastic wrap and placing it in a freezer-safe container or bag. It can be kept frozen for up to 3 months.

If you have leftovers, simply place them in an airtight container or cover with plastic wrap and refrigerate. They are best consumed within 2-3 days.

The Health Benefits of Galaxy Cake

While indulging in a slice of galaxy cake may seem like a guilty pleasure, did you know that this heavenly dessert can actually have some surprising health benefits? From its rich chocolate flavor to its nutritious ingredients, Galaxy Cake can be enjoyed guilt-free. Let’s take a closer look at the health benefits this delicious treat can provide:

1. Dark chocolate boosts mood and brain function

The 70% cocoa dark chocolate used in Galaxy Cake offers numerous health benefits. Dark chocolate contains natural compounds that increase serotonin levels in the brain, which can help improve mood and promote feelings of happiness. Additionally, the antioxidants found in dark chocolate have been linked to improved brain function and cognitive abilities.

2. Sour cream for healthy digestion

Adding a 300ml can of sour cream to galaxy cake not only adds to its moist and creamy consistency but also provides some digestive benefits. Sour cream contains probiotics, beneficial bacteria that can support healthy intestinal flora. These probiotics aid in digestion and nutrient absorption and promote a healthy digestive system.

3. Coffee for an energy boost

A double shot of espresso or 100 ml of strong hot coffee is added to the Galaxy cake recipe. Coffee is known for its stimulating effects due to its caffeine content. Consuming moderate amounts of coffee can help increase alertness, improve concentration, and increase physical performance.

4. Mars bars for a nutritious treat

The recipe includes a fun-sized 250g bag of mini Mars bars, adding a delicious caramel and chocolate surprise to every bite. Although Mars Bars are a sweet treat, they also offer some nutritional value. They contain important nutrients such as iron and potassium as well as small amounts of fiber and protein.

5. Flaked sea salt for mineral balance

Adding 1 teaspoon of sea salt flakes to the recipe enhances the flavors of the cake and provides trace minerals. Sea salt is minimally processed and contains minerals such as magnesium, calcium and potassium, which are essential for maintaining proper fluid balance, nerve function and muscle health.

So next time you’re craving a delicious piece of galaxy cake, remember that you’re not only enjoying a delicious dessert, but you’re also benefiting from its health-promoting ingredients. Enjoy!

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