Galaxy Themed Pisces Cake

Name: Galaxy Themed Pisces Cake
Prep time: 30 min
Cook time: 50 min
Total time: 1 h 20 min
Yield: 12 servings
Ingredients: 2 cups all-purpose flour; 2 cups granulated sugar; 3/4 cup unsweetened cocoa powder; 1 1/2 tsp baking powder; 1 1/2 tsp baking soda; 1 tsp salt; 2 large eggs; 1 cup whole milk; 1/2 cup vegetable oil; 2 tsp vanilla extract; 1 cup boiling water; 1 cup unsalted butter, softened; 4 cups powdered sugar; 1/4 cup blueberry puree; 1/4 cup heavy cream; Food coloring (blue, purple, black)

Highlighted under: From the Oven

I created this Galaxy Themed Pisces Cake to celebrate my love for both astrology and stunning desserts. Every layer reflects the hues of a twinkling night sky, with celestial designs that spark joy and curiosity. The flavors blend perfectly, from the rich chocolate sponge to the creamy blueberry frosting. It's more than just a cake; it's a piece of art that captivates everyone's attention. With a few special techniques and a touch of creativity, we can bring a galaxy of flavors into our kitchen, making each bite a delightful experience.

Created by

Amber Walsh

Last updated on 2026-02-10T18:09:36.107Z

This Galaxy Themed Pisces Cake was a delightful challenge. I experimented with different techniques to achieve the swirling galaxy effect using buttercream. The key is to start with a crumb coat to lock in the moisture and create a smooth canvas. I discovered that letting the cake chill before applying each layer of frosting prevents any mixing of colors, resulting in a gorgeous finish.

Each slice reveals a cosmic surprise with chocolate and blueberry marrying beautifully. The flavors are so vibrant, and it’s always exciting to see the reactions when I serve it at gatherings. We all love how a slice can brighten the mood and ignite conversations about the stars!

Why You'll Love This Cake
Stunning visual presentation inspired by the cosmos
Deliciously moist chocolate cake paired with creamy blueberry frosting
Great conversation starter for parties and gatherings

Mastering Texture for a Moist Cake

Achieving a moist chocolate cake requires careful attention to ingredient ratios and techniques. The combination of whole milk and vegetable oil enhances the cake's moisture, while the addition of boiling water helps to bloom the cocoa powder, resulting in a richer flavor. Ensure that you mix the batter until just combined to avoid overworking the gluten in the flour, which can lead to a dense texture. The cakes should be baked until a toothpick inserted in the center comes out clean, around 30-35 minutes, ensuring you don’t overbake them.

Once baked, allow the cakes to cool in their pans for about 10 minutes. This resting time lets the cake stabilize and prevents it from crumbling when you transfer it to a wire rack. Cooling completely is essential before frosting; if the layers are even slightly warm, the frosting can melt, causing it to slide off instead of sticking nicely, so patience is key here.

Creating Stunning Frosting Layers

The frosting is crucial for both flavor and the spectacular visual effect of the Galaxy Themed Pisces Cake. When beating the butter, make sure it is at room temperature; this will help create a smoother mixture. Gradually incorporating the powdered sugar with alternating heavy cream ensures the frosting is creamy and not overly sweet. If the frosting appears too thick, adding a bit more cream can help you achieve the desired spreading consistency.

Coloring the frosting can be straightforward yet impactful. Using food coloring in the frosting not only enhances the visual presentation but also allows you to play with shades to match your galaxy theme better. I recommend using gel food coloring, as it provides more vibrant colors without altering the frosting's texture. Remember to gently mix colors for a marbled effect instead of fully blending them for a more dynamic look.

Ingredients

Cake Ingredients

2 cups all-purpose flour
2 cups granulated sugar
3/4 cup unsweetened cocoa powder
1 1/2 tsp baking powder
1 1/2 tsp baking soda
1 tsp salt
2 large eggs
1 cup whole milk
1/2 cup vegetable oil
2 tsp vanilla extract
1 cup boiling water

Frosting Ingredients

1 cup unsalted butter, softened
4 cups powdered sugar
1/4 cup blueberry puree
1/4 cup heavy cream
Food coloring (blue, purple, black)

Instructions

Preparation Steps

Bake the Cake

Preheat the oven to 350°F (175°C). Grease and flour three 9-inch round cake pans. In a large bowl, combine flour, sugar, cocoa powder, baking powder, baking soda, and salt. Add eggs, milk, oil, and vanilla, mixing until just combined. Carefully stir in boiling water. Divide the batter evenly among the prepared pans and bake for 30-35 minutes or until a toothpick comes out clean. Cool the cakes in the pans for 10 minutes before transferring them to a wire rack.

Prepare the Frosting

In a mixing bowl, beat the softened butter until smooth. Gradually add powdered sugar, alternating with heavy cream. Mix until creamy and fluffy. Divide the frosting into three bowls, tint one blue, one purple, and leave one white. Add blueberry puree to the purple frosting for flavor.

Assemble the Cake

Start with one cake layer on a serving plate and spread a layer of frosting on top. Repeat with the second layer, then place the final layer on top. Apply a crumb coat of frosting around the sides and top of the cake. Chill for 30 minutes in the refrigerator.

Create the Galaxy Effect

After chilling, use the colored frosting to create swirls around the cake. Start with the blue, adding purples and whites as desired. Use a spatula to create a smooth finish while blending colors seamlessly. Decorate with edible glitter or star sprinkles.

Enjoy Your Cake!

Pro Tips

For best results, ensure all ingredients are at room temperature before beginning. The blueberry puree adds both flavor and a stunning color to the frosting. Don’t be afraid to experiment with colors to achieve your desired galaxy look!

Storage and Make-Ahead Tips

To keep your Galaxy Themed Pisces Cake fresh, store it in an airtight container in the refrigerator for up to five days. If you're preparing in advance, you can bake the layers a day ahead. Once cooled completely, wrap each layer tightly in plastic wrap and store them in the fridge. When ready to frost, let the layers come to room temperature before proceeding.

For longer storage, consider freezing the cake layers. Wrap them tightly in plastic wrap and then in aluminum foil. Frozen layers can be kept for up to three months. Thaw them overnight in the refrigerator and allow them to reach room temperature before frosting. This technique helps preserve moisture and maintains flavor.

Serving Suggestions and Variations

For a unique serving suggestion, consider pairing the cake with a scoop of vanilla ice cream or a dollop of whipped cream to complement its rich chocolate and blueberry flavors. Adding fresh blueberries on top or on the plate can enhance the visual appeal while introducing a burst of freshness with each bite.

If you wish to change the flavor profile, you can substitute the blueberry puree for raspberry or strawberry puree, creating a different color scheme and taste while still adhering to the galaxy theme. Even a layer of lemon curd between the chocolate cake and frosting could elevate the flavor, introducing a tangy contrast that surprises and delights.

Questions About Recipes

→ Can I use a different flavor for the cake?

Absolutely! You can substitute chocolate with vanilla or any other flavor you prefer.

→ How do I store leftover cake?

Store it in an airtight container in the refrigerator for up to 3 days.

→ Can I make this cake ahead of time?

Yes! Bake the cake layers a day in advance and frost on the day of serving for best results.

→ Is this cake suitable for freezing?

Yes, you can freeze the un-frosted cake layers for up to 2 months. Just wrap them well to prevent freezer burn.