Two-Tier Cake with Balloons (Printable Version)

Moist vanilla sponge layered with creamy buttercream and decorated with colorful balloon toppers for a festive look.

# Needed Ingredients:

→ 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 - 1 pinch salt
14 - Gel food coloring, optional

→ Decoration

15 - Balloon cake toppers, store-bought or homemade
16 - Edible confetti or sprinkles, optional

# Preparation Steps:

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 combined.
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, beating well after each addition. Mix in vanilla extract until fully incorporated.
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.
06 - Divide batter evenly between the 8-inch and 6-inch pans. Tap pans gently 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 center comes out clean.
08 - Allow cakes to cool in pans for 10 minutes, then transfer to wire racks to cool completely.
09 - Beat butter until creamy. Gradually add powdered sugar, beating well. Mix in vanilla, salt, and milk one tablespoon at a time until smooth and spreadable. Tint with food coloring if desired.
10 - Level cake tops if needed. Place one 8-inch layer on cake board, spread buttercream layer, top with second 8-inch cake. Repeat process for 6-inch cakes.
11 - Apply thin crumb coat of buttercream to each cake tier. Refrigerate for 20 minutes.
12 - Frost cakes smoothly with remaining buttercream. Stack 6-inch cake tier centered on top of 8-inch tier, using dowels or straws for support if needed.
13 - Place balloon toppers on cake and add edible confetti or sprinkles as desired.

# Expert Advice:

01 -
  • It's actually easier than it looks, and the two-tier structure makes any celebration feel genuinely special without requiring a professional bakery.
  • The vanilla sponge is impossibly moist, and people always ask for the secret (it's the milk in the batter—I learned that by happy accident).
  • Watching someone's face light up when they see their graduated colors on top of a cake you made yourself is a feeling you can't buy.
02 -
  • Room temperature ingredients are non-negotiable for this recipe—cold butter won't cream properly, cold eggs can curdle the batter, and cold milk can seize the mixture into a separated mess.
  • The crumb coat isn't an extra step you can skip; it's the secret to a professional-looking frosting finish, so refrigerate it before doing your final frosting layer.
  • Dowels or straws in the lower tier aren't optional once you go two-tier; without them, the weight of the top cake will slowly sink into the frosting and eventually topple sideways.
03 -
  • Chill the assembled cake for at least an hour before serving so the frosting firms up and the layers set; this prevents the cake from shifting when you slice it.
  • A cake turntable isn't essential but makes frosting dramatically easier and faster, and your shoulders will thank you for not rotating the entire cake by hand.
  • If you're baking a day ahead, wrap the cooled unfrosted cakes tightly in plastic wrap and refrigerate them; they'll be easier to frost and won't dry out overnight.
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