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Graduation Buttercream Sheet Cake

Featured in: Comfort Baking Basics

Create a stunning sheet cake that celebrates academic achievement, featuring soft layers, creamy buttercream frosting, and an edible diploma. Using vibrant food coloring, pipe beautiful roses and leaves to decorate the cake. Personalize with school colors, pearls, or fondant accents. The process includes mixing a moist cake batter, baking, cooling, and masterful decorating. Versatile for large gatherings due to generous yield, it accommodates creative flourishes. Great for honoring graduates, this dessert impresses with both flavor and presentation, making your celebration memorable.

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Updated on Mon, 16 Mar 2026 09:04:00 GMT
A festive sheet cake with buttercream roses and an edible diploma, perfect for graduation celebrations. Save
A festive sheet cake with buttercream roses and an edible diploma, perfect for graduation celebrations. | buenoaytar.com

Ingredients

  • The backbone of the cake, sift for extra-light crumb and avoid compact measurements.
  • Gives a classic sweetness and structure—mix slowly with butter for maximum fluffiness.
  • Use really softened butter for the cake and frosting; cold butter wont whip as smoothly.
  • Room temperature milk keeps the texture supple and prevents curdling.
  • Crack each egg individually—no risk of surprise shells and it helps with even blending.
  • I learned to measure generously, nothing wakes up the cake more.
  • Makes the cake rise just enough, but always check its freshness with a quick fizz test in water.
  • Just a pinch balances the sweetness.
  • Sifted to avoid lumps in your buttercream, creating that signature silky swirl.
  • Gel coloring is the secret to vivid roses without making your frosting watery.
  • Optional but instantly make the cake sparkle—add right before serving so they dont sink.
  • Use for diploma, fondant is easier to sculpt, but white chocolate gives a rich flavor.

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Instructions

Celebrate graduation with a beautifully decorated sheet cake topped with buttercream roses and a fondant diploma. Save
Celebrate graduation with a beautifully decorated sheet cake topped with buttercream roses and a fondant diploma. | buenoaytar.com

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Perfect Buttercream Roses—My Piping Ritual

How to Make an Edible Diploma That's Actually Fun

Troubleshooting Your Sheet Cake (Because Things Happen)

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A crowd-pleasing graduation cake featuring luscious buttercream roses and an edible diploma scroll for a memorable celebration. Save
A crowd-pleasing graduation cake featuring luscious buttercream roses and an edible diploma scroll for a memorable celebration. | buenoaytar.com

Questions & Answers

→ How can I achieve vibrant buttercream colors?

Use gel food coloring to tint buttercream without thinning, allowing rich hues for roses and leaves.

→ Can the cake be made ahead of time?

Bake and cool the cake a day ahead. Frost and decorate just before serving for freshest results.

→ How do I create a fondant diploma for decoration?

Roll fondant or white chocolate into a scroll, tie with colored ribbon, and gently place it atop the cake.

→ How can I personalize the cake for grads?

Use food coloring in school colors for roses and ribbons, and add edible pearls as accent details.

→ Is it possible to use a different cake flavor?

Swap ¾ cup flour for cocoa powder to make chocolate layers, or add extract for other flavor variations.

→ What tools are needed for decorating?

Piping bags and tips, offset spatula, and fondant tools help create roses, leaves, and diploma accents.

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Graduation Buttercream Sheet Cake

Crowd-pleasing sheet cake adorned with buttercream roses and edible diploma—ideal for graduation festivities.

Prep Duration
40 min
Cooking Duration
30 min
Overall Time
70 min
Written by Hector Morales


Skill Level Medium

Cuisine Type American

Portions 24 Portion Size

Diet Preferences Vegetarian-Friendly

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

01 2 cups unsalted butter, softened
02 8 cups powdered sugar, sifted
03 1/2 cup whole milk or heavy cream
04 2 teaspoons vanilla extract
05 Gel food coloring as needed

Decorations

01 Edible gold or silver pearls (optional)
02 Fondant or white chocolate for diploma and ribbon (optional)

How-To Steps

Step 01

Oven Preparation: Preheat the oven to 350°F. Grease and line a 12x18-inch sheet pan with parchment paper.

Step 02

Cream Butter and Sugar: In a large bowl, use an electric mixer to beat unsalted butter and granulated sugar until pale and fluffy, about 3 minutes.

Step 03

Incorporate Eggs and Vanilla: Add eggs one at a time, mixing well after each. Stir in vanilla extract until combined.

Step 04

Blend Dry Ingredients: In a separate bowl, whisk together all-purpose flour, baking powder, and salt.

Step 05

Combine Wet and Dry Mixtures: Add the flour mixture to the butter mixture in three additions, alternating with the milk and beginning and ending with the flour. Mix gently until just combined.

Step 06

Transfer Batter: Pour batter into the prepared sheet pan and smooth the surface with an offset spatula.

Step 07

Bake: Bake for 28 to 32 minutes, or until a toothpick inserted into the center emerges clean.

Step 08

Cool: Let the baked cake cool in the pan for 10 minutes, then turn out onto a cooling rack to cool completely.

Step 09

Prepare Buttercream: In a mixing bowl, beat unsalted butter until creamy. Gradually add powdered sugar, vanilla, and milk or cream, mixing until light and fluffy. Adjust the consistency as needed.

Step 10

Tint Buttercream: Divide buttercream into several bowls. Tint portions pink, red, or yellow for roses, green for leaves, and leave some white for coating.

Step 11

Frost Cake: Spread a smooth, even layer of white buttercream over the cooled cake using an offset spatula.

Step 12

Pipe Buttercream Roses: Fit a piping bag with a rose tip and pipe buttercream roses in desired colors. Use a leaf tip to pipe green leaves.

Step 13

Create Diploma Accent: Shape fondant or white chocolate into a rolled diploma scroll. Attach a ribbon of colored fondant, then place the scroll atop the cake.

Step 14

Add Decorative Accents: Embellish with edible pearls and additional details as desired.

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Tools Needed

  • 12x18-inch sheet cake pan
  • Electric mixer
  • Mixing bowls
  • Parchment paper
  • Cooling rack
  • Offset spatula
  • Piping bags
  • Piping tips
  • Fondant tools

Allergy Info

Review each item for allergens and reach out to a specialist if unsure.
  • Contains wheat (gluten), eggs, milk (dairy). Decorations and food coloring may contain additional allergens. Verify all labels if uncertain.

Nutrition Info (per serving)

Nutrition details are for general knowledge. For medical concerns, speak with a professional.
  • Energy: 430
  • Fats: 20 g
  • Carbohydrates: 59 g
  • Proteins: 4 g

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