Two-Tier Vanilla Sponge Cake (Printable)

Moist two-tier vanilla sponge layered with creamy buttercream and festive balloon toppers for special occasions.

# What you need:

→ Vanilla Sponge Cakes

01 - 4.5 cups all-purpose flour
02 - 3.5 teaspoons baking powder
03 - 0.5 teaspoon salt
04 - 2.5 cups granulated sugar
05 - 1.5 cups unsalted butter, room temperature
06 - 8 large eggs, room temperature
07 - 2 tablespoons pure vanilla extract
08 - 2 cups whole milk, room temperature

→ Buttercream Frosting

09 - 2 cups unsalted butter, room temperature
10 - 8 cups powdered sugar, sifted
11 - 0.5 cup whole milk or heavy cream
12 - 2 tablespoons vanilla extract
13 - Pinch of salt
14 - Gel food coloring, optional

→ Decoration

15 - Balloon cake toppers with food-safe sticks
16 - Edible confetti or sprinkles, optional

# How to make it:

01 - Preheat oven to 350°F. Grease and line two 8-inch round cake pans and two 6-inch round cake pans 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 together until light and fluffy, approximately 3 to 5 minutes.
04 - Add eggs one at a time to the butter mixture, beating well after each addition. Mix in vanilla extract until fully combined.
05 - With mixer on low speed, alternate adding the flour mixture and milk in three additions, beginning and ending with flour. Mix until just combined, avoiding overmixing.
06 - Divide batter evenly among the prepared pans. Gently tap each pan on the counter to release air bubbles.
07 - Bake 8-inch cakes for 35 to 40 minutes and 6-inch cakes for 25 to 30 minutes, until a toothpick inserted in the center comes out clean.
08 - Allow cakes to cool in pans for 10 minutes, then transfer to wire racks to cool completely before frosting.
09 - Beat room temperature butter until creamy. Gradually add sifted powdered sugar, beating well. Mix in vanilla extract, salt, and milk or cream, 1 tablespoon at a time, until smooth and spreadable. Tint with food coloring if desired.
10 - Level cake tops if necessary. Place one 8-inch layer on a cake board, spread a thin layer of buttercream, top with the second 8-inch cake. Repeat this process with the 6-inch cakes.
11 - Apply a thin crumb coat of buttercream to each assembled cake to seal in loose crumbs. Chill both cakes for 20 minutes.
12 - Frost both cakes smoothly with remaining buttercream. Stack the 6-inch tier centered on top of the 8-inch tier, using dowels or straws for structural support if needed.
13 - Position balloon toppers and add edible confetti or sprinkles as desired to complete the graduated cake design.

# Helpful Hints:

01 -
  • The vanilla sponge is impossibly moist and tender, staying soft for days without drying out—perfect for a cake that needs to sit through an afternoon party.
  • Buttercream frosting that's silky enough to pipe but sturdy enough to support two tiers, and it takes gel food coloring beautifully for personalized school colors.
  • The entire project feels more impressive than it actually is, which means you'll look like a baking wizard without needing years of experience.
02 -
  • Room temperature ingredients are absolutely essential—cold ingredients won't blend properly and you'll end up with a dense cake instead of a tender crumb, no matter how carefully you follow everything else.
  • The crumb coat isn't optional; it's the difference between a frosting-covered cake and a professional-looking cake that you'll be proud to display.
  • Dowels or straws in the bottom tier are non-negotiable for a two-tier cake—gravity is real, and without support, the top tier will sink into the bottom one within hours.
03 -
  • If you're adding gel food coloring to the frosting, add it drop by drop and beat well between drops—the color deepens as you mix, and it's easy to overshoot and end up with frosting that's too dark.
  • A cake turntable changes everything when you're frosting—it lets you spin toward yourself instead of reaching awkwardly, and your strokes become smoother and more even without any extra skill required.
  • Make the cake the day before and store it covered at room temperature—it actually becomes more moist and flavorful overnight as the layers set and the flavors marry.
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