Graduation Buttercream Roses Diploma (Printable)

A festive sheet cake with buttercream roses and edible diploma—ideal for large celebrations.

# What You'll Need:

→ Cake

01 - 3 cups all-purpose flour
02 - 2 1/2 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 1/2 teaspoons baking powder
08 - 1/2 teaspoon salt

→ Buttercream Frosting

09 - 2 cups unsalted butter, softened
10 - 8 cups powdered sugar, sifted
11 - 1/2 cup whole milk or heavy cream
12 - 2 teaspoons vanilla extract
13 - Food coloring (gel preferred), 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)

# How to Make It:

01 - Preheat oven to 350°F. Grease and line a 12x18-inch sheet cake pan with parchment paper.
02 - In a large mixing bowl, beat unsalted butter and granulated sugar together until light and fluffy, approximately 3 minutes.
03 - Add eggs one at a time, mixing thoroughly after each addition. Stir in vanilla extract until evenly distributed.
04 - In a separate bowl, whisk together all-purpose flour, baking powder, and salt.
05 - Add flour mixture to butter mixture in three additions, alternating with milk. Begin and end with flour mixture. Mix until just combined.
06 - Pour batter into prepared pan and smooth the surface. Bake for 28–32 minutes or until a toothpick inserted in the center comes out clean.
07 - Cool in pan for 10 minutes, then transfer to a wire rack to cool completely.
08 - Beat unsalted butter until creamy. Gradually add powdered sugar, vanilla extract, and milk, mixing until light and fluffy. Adjust consistency with additional milk or sugar if necessary.
09 - Divide buttercream into bowls. Tint portions pink, red, or yellow for roses, green for leaves, and leave some white for cake coating.
10 - Spread a smooth layer of white buttercream over the cooled cake using an offset spatula.
11 - Using a piping bag fitted with a rose tip, pipe buttercream roses in desired colors. Create leaves using a leaf tip with green buttercream.
12 - Shape fondant or white chocolate into a scroll, add a ribbon made from colored fondant, and place it decoratively on the cake.
13 - Place edible gold or silver pearls and desired decorative accents onto the cake.

# Expert Advice:

01 -
  • The buttercream roses are so luscious, guests won't believe they're homemade.
  • The edible diploma makes the cake feel tailor-made for your grad, and it's always the centerpiece of the party.
02 -
  • I once rushed the cooling and ended up with runny buttercream—patience pays off!
  • Switching to gel colors made my roses look professionally vibrant and prevented watery frosting.
03 -
  • Allow the cake to cool completely before any frosting, or the buttercream will slide off.
  • Use a rose piping tip—Wilton 104—for the best shaped petals every time.
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