Graduation Sheet Cake Buttercream Roses (Printable)

Decorative sheet cake celebrates grads with buttercream roses and an edible diploma—festive, vibrant, and crowd-friendly.

# What you need:

→ Cake

01 - 3 cups all-purpose flour
02 - 2 ½ cups granulated sugar
03 - 1 cup unsalted butter, softened
04 - 1 cup whole milk, room temperature
05 - 6 large eggs, room temperature
06 - 1 tablespoon vanilla extract
07 - 2 ½ teaspoons baking powder
08 - ½ teaspoon salt

→ Buttercream Frosting

09 - 2 cups unsalted butter, softened
10 - 8 cups powdered sugar, sifted
11 - ½ cup whole milk or heavy cream
12 - 2 teaspoons vanilla extract
13 - Food coloring, as needed for roses, leaves, and diploma

→ Decorations

14 - Edible gold or silver pearls, optional, for accents
15 - Fondant or white chocolate for diploma and ribbon, optional

# Directions:

01 - Preheat oven to 350°F. Grease a 12x18-inch sheet cake pan and line with parchment paper.
02 - In a large mixing bowl, beat the unsalted butter and granulated sugar with an electric mixer until light and fluffy, about three minutes.
03 - Incorporate eggs one at a time, mixing thoroughly after each addition. Blend in vanilla extract.
04 - In a separate bowl, whisk together all-purpose flour, baking powder, and salt.
05 - Add the dry ingredients to the butter mixture in three parts, alternating with whole milk. Begin and end with the flour mixture. Mix until just combined.
06 - Pour batter into prepared pan and spread evenly with an offset spatula. Bake for 28 to 32 minutes or until a toothpick inserted in the center comes out clean.
07 - Allow cake to cool in the pan for ten minutes, then transfer to a cooling rack until completely cooled.
08 - Beat softened unsalted butter until creamy. Gradually add sifted powdered sugar, vanilla extract, and milk or cream, mixing until fluffy. Adjust consistency as needed with additional milk or sugar.
09 - Separate buttercream into portions for coloring. Tint with gel food coloring for roses, leaves, and diploma, leaving some white for the base coat.
10 - Spread a smooth layer of white buttercream over the cooled cake using an offset spatula.
11 - Using piping bags fitted with rose and leaf tips, pipe buttercream roses and green leaves onto the cake.
12 - Shape fondant or white chocolate into a scroll and tie with colored fondant ribbon. Position the diploma on the cake.
13 - Garnish with edible pearls and desired accents.

# Expert tips:

01 -
  • This cake is big enough to feed a crowd but still feels like it was made just for the guest of honor.
  • The buttercream roses and edible diploma are conversation starters—and a delight for anyone who loves whimsical desserts.
02 -
  • Never frost the cake while it’s warm—my first attempt melted everything into a sweet puddle.
  • Stiff buttercream holds its shape better for roses and leaves; a splash more powdered sugar makes all the difference.
03 -
  • For sharp buttercream details, wipe piping tips between roses and keep the frosting cool.
  • Swirl two colors together for depth in petals—this works wonders for standout decorations.
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