Galaxy Graduation Cake Delight (Print Version)

A celestial cake with galaxy buttercream and sparkling stars, perfect for special celebrations.

# Ingredients List:

→ For the Cake

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

→ For the Galaxy Buttercream

09 - 1 1/2 cups unsalted butter, softened
10 - 5 cups powdered sugar, sifted
11 - 1/4 cup whole milk
12 - 2 teaspoons vanilla extract
13 - Gel food coloring in black, navy blue, purple, pink, and teal

→ For Decoration

14 - Edible gold and silver star sprinkles
15 - Edible glitter or luster dust
16 - White gel food coloring for stars and swirls

# Directions:

01 - Preheat oven to 350°F. Grease and line three 8-inch round cake pans with parchment paper.
02 - In a large bowl, cream together butter and sugar until light and fluffy. Add eggs one at a time, beating well after each addition. Mix in vanilla extract.
03 - In a separate bowl, whisk together flour, baking powder, and salt.
04 - Add dry ingredients to wet mixture in three parts, alternating with milk, beginning and ending with flour. Mix until just combined.
05 - Divide batter evenly among prepared pans. Bake for 30 to 35 minutes or until a toothpick inserted in the center comes out clean.
06 - Cool cakes in pans for 10 minutes, then transfer to wire racks to cool completely.
07 - Beat butter until creamy. Gradually add powdered sugar, then milk and vanilla. Beat until fluffy.
08 - Divide buttercream into four or five bowls. Tint each with a different galaxy color using gel food coloring.
09 - Place random spoonfuls of each color onto plastic wrap. Roll up to form a log. Snip one end and transfer to a piping bag fitted with a large round tip.
10 - Place one cake layer on a serving plate. Spread a thin layer of galaxy buttercream. Repeat with remaining layers.
11 - Apply a generous crumb coat all over the cake. Chill for 20 minutes.
12 - Pipe and spread galaxy buttercream over cake, swirling gently with an offset spatula to create a marbled galaxy effect.
13 - Use white gel food coloring and a food-safe paintbrush or splatter tool to flick stars across the cake surface.
14 - Decorate with edible gold and silver star sprinkles and a sprinkle of edible glitter or luster dust. Optionally add a graduation cap cake topper.

# Expert Tips:

01 -
  • It looks like you hired a professional baker, but the technique is forgiving enough that happy accidents actually make it prettier.
  • Three layers mean you get to practice your frosting game without the pressure of a single-layer showstopper.
  • The flavor stays classic and buttery while the galaxy buttercream turns heads—it's genuinely delicious underneath all that sparkle.
02 -
  • Buttercream breaks when you add cold milk or when you overmix—add milk slowly and only beat until combined, not until it looks silky anymore.
  • The plastic wrap technique for the galaxy log is a game-changer because you're pre-swirling, which means less stress when actually decorating the cake.
  • Cakes sink in the middle if your oven runs hot or if you open the door too early—get an oven thermometer and trust it instead of guessing.
03 -
  • Measure flour by spooning it into the cup and leveling with a knife instead of scooping directly from the bag—this prevents over-packing and a dense cake.
  • Make the buttercream the day before if you can, because it pipes better when it's had time to rest in the fridge overnight.
  • If your cake layers dome on top, slice them flat with a serrated knife once they're cool—it takes 30 seconds and makes stacking infinitely easier.
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