Pisces Cake Ocean Waves (Printer View)

Moist vanilla sponge layered with blue ombré buttercream and piped ocean wave decorations.

# What you'll need:

→ Cake

01 - 2 1/2 cups all-purpose flour
02 - 2 1/2 teaspoons baking powder
03 - 1/2 teaspoon salt
04 - 1 cup unsalted butter, room temperature
05 - 1 3/4 cups granulated sugar
06 - 4 large eggs, room temperature
07 - 1 tablespoon pure vanilla extract
08 - 1 cup whole milk, room temperature

→ Buttercream Frosting

09 - 1 1/2 cups unsalted butter, room temperature
10 - 5 cups powdered sugar, sifted
11 - 2 teaspoons pure vanilla extract
12 - 1/4 cup whole milk, room temperature
13 - Blue gel food coloring in various shades
14 - White gel food coloring

→ Decoration

15 - Edible pearls or sugar pearls (optional)
16 - White chocolate or fondant for Pisces symbol (optional)

# Method:

01 - Preheat oven to 350°F. Grease and line a 9x13-inch sheet cake pan with parchment paper.
02 - In a medium bowl, whisk together flour, baking powder, and salt.
03 - In a large bowl, beat butter and sugar until light and fluffy, approximately 3 minutes.
04 - Add eggs one at a time, mixing well after each addition. Beat in vanilla extract.
05 - Alternately add flour mixture and milk to the butter mixture, beginning and ending with flour. Mix until just combined.
06 - Pour batter into prepared pan and smooth the top. Bake for 28-32 minutes, or until a toothpick inserted in the center comes out clean.
07 - Cool cake in pan for 10 minutes, then transfer to a wire rack to cool completely.
08 - Beat butter on medium speed until creamy, about 2 minutes. Gradually add powdered sugar, mixing on low speed. Add vanilla extract and milk; beat until fluffy and smooth.
09 - Divide buttercream into 3-4 bowls. Tint each with varying shades of blue, ranging from deep ocean blue to pale aqua, and leave one portion white.
10 - Once cake is completely cool, spread a thin layer of white buttercream over the entire cake as a crumb coat. Chill for 20 minutes.
11 - With an offset spatula, layer blue buttercreams in wave-like shapes across the cake, starting with the darkest shade at the base and working up to the lightest. Use swooping motions to mimic ocean waves.
12 - Pipe or swirl white buttercream on top to create sea foam effect.
13 - Optionally decorate with edible pearls and add a Pisces symbol made from white chocolate or fondant.

# Expert Advice:

01 -
  • The vanilla sponge stays impossibly moist for days, which means you can actually bake ahead without that dry-cake regret.
  • Wave decorating looks complicated but becomes almost meditative once you find your rhythm with the offset spatula.
  • It's a conversation starter masquerading as dessert, the kind of cake people photograph before eating.
02 -
  • Gel food coloring is non-negotiable here—liquid coloring will thin your buttercream and your waves will slide off the cake like they're melting.
  • The crumb coat step feels unnecessary until you skip it and watch crumbs swirl through your beautiful blue frosting, permanently teaching you the lesson.
03 -
  • Add lemon zest to the cake batter for brightness that cuts through the richness of the buttercream—your mouth will thank you.
  • Make this cake a day ahead; the flavors actually develop better and you bake off the stress about timing on your actual celebration day.
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