Pisces Sheet Cake Ocean Waves (Printer-Friendly)

Vanilla sponge layered with blue ombré frosting shaped like ocean waves and accented with pearls.

# 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

# How to Cook:

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 on medium speed 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 combined.
05 - Alternately add flour mixture and milk to the butter mixture, beginning and ending with flour. Mix on low speed until just combined, avoiding overmixing.
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 before frosting.
08 - Beat butter on medium speed until creamy, about 2 minutes. Gradually add powdered sugar on low speed. Add vanilla extract and milk, then beat until fluffy and smooth.
09 - Divide buttercream into 3-4 bowls. Tint each with varying shades of blue from deep ocean blue to pale aqua, and leave one portion white.
10 - Spread a thin layer of white buttercream over the entire cake as a crumb coat. Chill for 20 minutes.
11 - Using 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 - Decorate with edible pearls and add a Pisces symbol made from white chocolate or fondant if desired.

# Expert Advice:

01 -
  • The vanilla cake is impossibly moist and buttery, staying soft for days thanks to the milk-to-flour ratio that just works.
  • You don't need professional piping skills—the ocean wave effect is forgiving and actually more beautiful when it looks organic and unpolished.
  • It's a showstopper that makes people think you spent hours in the kitchen, but the whole project takes just over an hour.
02 -
  • Gel food coloring is absolutely essential—liquid coloring will thin your buttercream and turn your carefully piped waves into a runny mess, something I discovered the hard way.
  • That crumb coat step isn't optional; it's the difference between a polished cake and one that looks like you fought with the frosting, and honestly, it's worth the extra 20 minutes of chilling time.
03 -
  • If your frosting starts to look greasy or breaks while you're beating it, pop the bowl in the fridge for 10 minutes, then beat again—this usually brings it back to silky perfection.
  • Use a piping bag fitted with a petal or ruffle tip for sea foam instead of a round tip; the effect is dramatically more convincing and takes the same amount of effort.
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