Pisces Cake Sheet Ocean (Printable Version)

Vanilla sponge layered with blue ombré buttercream and ocean-inspired piped waves.

# Ingredient List:

→ 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
16 - White chocolate or fondant for Pisces symbol

# Steps:

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. Add vanilla 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 base layer. 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 - Decorate with edible pearls and add a Pisces symbol made from white chocolate or fondant as desired.

# Expert Advice:

01 -
  • The sponge is genuinely moist and tender—no dry cake disasters here, just pure vanilla comfort.
  • You get to play artist with buttercream and colors, which somehow makes the whole process feel less like baking and more like creating something special.
  • It actually looks like you spent hours on it, but the technique is forgiving enough that small imperfections just read as authentic ocean movement.
02 -
  • Room temperature ingredients are absolutely critical—they emulsify together and create that tender crumb, and there's no shortcut or substitute for this step.
  • Gel food coloring is a game-changer for blue buttercream; liquid coloring will thin your frosting and make it impossible to pipe, but gel stays thick and vibrant.
03 -
  • If your blue buttercream looks muddy, add a tiny drop of white gel coloring to brighten it back up without diluting the shade.
  • An offset spatula is genuinely the tool that makes or breaks this cake—straight edges create lines, but a curved offset spatula lets you make those organic wave shapes that actually look like water.
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