Pisces Cake Ocean Wave (Printable)

Moist vanilla sponge with layered blue ombré buttercream mimicking ocean waves and delicate piped sea foam.

# What You Need:

→ Cake

01 - 2½ cups all-purpose flour
02 - 2½ teaspoons baking powder
03 - ½ teaspoon salt
04 - 1 cup unsalted butter, room temperature
05 - 1¾ 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 - 1½ cups unsalted butter, room temperature
10 - 5 cups powdered sugar, sifted
11 - 2 teaspoons pure vanilla extract
12 - ¼ 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

# Step-by-Step:

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 until evenly distributed.
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 until fully incorporated.
05 - Alternately add flour mixture and milk to butter mixture, beginning and ending with flour. Mix until just combined, avoiding overmixing.
06 - Pour batter into prepared pan and smooth the top. Bake for 28 to 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 before frosting.
08 - Beat butter on medium speed until creamy, about 2 minutes. Gradually add powdered sugar on low speed. Add vanilla and milk, then beat until fluffy and smooth.
09 - Divide buttercream into 3 to 4 bowls. Tint each with varying shades of blue from deep ocean to pale aqua, and leave one portion white.
10 - Spread a thin layer of white buttercream over entire cooled cake as a crumb coat. Chill for 20 minutes.
11 - With an offset spatula, layer blue buttercreams in wave-like shapes across cake, starting with darkest shade at base and working up to lightest. Use swooping motions to mimic ocean waves.
12 - Pipe or swirl white buttercream on top to create sea foam texture and details.
13 - Decorate with edible pearls and add a Pisces symbol made from white chocolate or fondant if desired.

# Expert Suggestions:

01 -
  • The vanilla cake stays impossibly moist and tender, so people always assume you bought it from a bakery.
  • Decorating with buttercream waves is genuinely therapeutic, and even imperfect swoops look intentional and dreamy.
02 -
  • Room temperature ingredients are not optional—I learned this the hard way with a dense, separated batter that baked unevenly.
  • Gel food coloring is essential because liquid coloring will thin your buttercream to the point where it won't hold piping, and your waves will collapse.
03 -
  • Chill the cake between decorating steps—a cold cake holds sharp lines and prevents frosting from sliding around while you work.
  • If your buttercream gets too warm while piping, pop it in the fridge for 5 minutes to reset its structure instead of adding more powdered sugar, which makes it grainy.
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