Pisces Ocean Galaxy Cake (Printable)

Whimsical vanilla cake with ocean-inspired galaxy buttercream and a marbled starry finish.

# Components:

→ Cake

01 - 2.5 cups all-purpose flour
02 - 2.5 teaspoons baking powder
03 - 0.5 teaspoon salt
04 - 1 cup unsalted butter, softened
05 - 1.75 cups granulated sugar
06 - 4 large eggs, room temperature
07 - 2 teaspoons vanilla extract
08 - 1 cup whole milk, room temperature

→ Ocean Galaxy Buttercream

09 - 1.5 cups unsalted butter, softened
10 - 6 cups powdered sugar, sifted
11 - 0.25 cup whole milk
12 - 2 teaspoons vanilla extract
13 - Gel food coloring in navy blue, teal, purple, turquoise, and white
14 - Edible glitter or white sprinkles for garnish

# Method:

01 - Preheat oven to 350°F. Grease and line two 8-inch round cake pans with parchment paper.
02 - In a medium bowl, whisk together flour, baking powder, and salt. Set aside.
03 - In a large bowl, beat softened butter and sugar with an electric mixer until light and fluffy, approximately 3-4 minutes.
04 - Add eggs one at a time, mixing thoroughly after each addition. Stir in vanilla extract.
05 - Alternately add dry ingredient mixture and milk to butter mixture, starting and ending with flour. Mix until just combined.
06 - Divide batter evenly between prepared pans. Smooth tops and bake for 28-32 minutes until a toothpick inserted in center comes out clean.
07 - Cool cakes in pans for 10 minutes, then turn out onto wire racks to cool completely.
08 - Beat softened butter until creamy. Gradually add powdered sugar, beating well. Add vanilla and milk; beat until smooth and fluffy, approximately 3-4 minutes.
09 - Divide buttercream into 4-5 bowls. Tint each portion with gel food coloring to create navy, teal, purple, turquoise shades, leaving one portion white.
10 - Place random dollops of each colored buttercream onto cake. Use an offset spatula to swirl colors together creating a marbled galaxy effect.
11 - Decorate cake with edible glitter or white sprinkles for a starry appearance.
12 - Refrigerate cake for at least 30 minutes before slicing to ensure clean layers.

# Expert Advice:

01 -
  • The vanilla base is forgiving enough for beginners but impressive enough to make anyone feel like a pastry chef.
  • Watching the colors swirl together feels like meditation, plus you get to eat art afterward.
  • It's memorable without being fussy—no fancy techniques required, just patience and a steady hand with the spatula.
02 -
  • Room temperature ingredients (especially butter, eggs, and milk) blend into the batter smoothly and create a more tender crumb than cold ingredients ever could.
  • Sifting powdered sugar sounds tedious until you taste the difference between lumpy frosting and the silky kind that spreads like a dream.
  • Gel food coloring is absolutely worth seeking out because liquid coloring turns your frosting watery and ruins the texture you worked hard to create.
03 -
  • If your buttercream starts looking greasy or separated after adding colors, beat it for another minute or two and it'll come back together silky and smooth.
  • Keep your offset spatula warm by dipping it in hot water and wiping it dry between swirls—warm tools blend colors more seamlessly than cold ones.
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