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High School Graduation Sheet Cake

Featured in: Sweet Comfort Bakes

Celebrate graduation in style with a moist vanilla sheet cake, adorned with creamy buttercream frosting and custom Class of 2026 piping. This dessert serves a crowd, offering tender crumb and festive decorations using vibrant school colors. Simple steps ensure fluffy cake and smooth frosting, while personalized touches like edible glitter or sprinkles add flair. Ideal for school parties, this sheet cake is easy to slice, chills well for serving, and stays fresh for days. Pair with sparkling beverages for a memorable occasion.

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Updated on Sun, 15 Mar 2026 17:23:00 GMT
Festive vanilla sheet cake decorated with Class of 2026 buttercream piping and colorful sprinkles, perfect for graduation celebrations. Pin It
Festive vanilla sheet cake decorated with Class of 2026 buttercream piping and colorful sprinkles, perfect for graduation celebrations. | sweetbatata.com

Ingredients

  • For a sturdy, tender crumb that holds up to generous frosting and slicing; always sift for extra lightness.
  • Ensures the cake rises evenly—I've learned to check expiration dates for reliable lift.
  • Balances sweetness and deepens the vanilla flavor, so don't skip it.
  • Gives richness and lets you control salt; room temperature makes creaming a breeze.
  • Adds sweetness and structure—beating it well with butter is key for fluffy texture.
  • Bind ingredients and give cake a lovely golden color; always bring to room temp to avoid curdling.
  • The soul of this cake; use real extract if possible for the warmest aroma.
  • Moistens the batter so it's velvety soft—room temperature keeps everything smooth.
  • Sifted to ensure the buttercream is silky and lump-free.
  • Gel colors give vivid results without changing frosting texture; test shades before piping.
  • Optional, but who doesn't love extra sparkle on a celebration cake?

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Instructions

Moist and fluffy sheet cake with creamy vanilla frosting, featuring Class of 2026 piping for a memorable graduation dessert. Pin It
Moist and fluffy sheet cake with creamy vanilla frosting, featuring Class of 2026 piping for a memorable graduation dessert. | sweetbatata.com

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Decorating Sheet Cakes Fearlessly

Mastering Buttercream in Real Time

Preparing for Graduation Party Success

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Creamy buttercream-frosted vanilla sheet cake with Class of 2026 piping, decorated in school colors for a festive graduation party. Pin It
Creamy buttercream-frosted vanilla sheet cake with Class of 2026 piping, decorated in school colors for a festive graduation party. | sweetbatata.com

Recipe Questions & Answers

→ How can I achieve vibrant piping colors?

Use gel food coloring in the buttercream to create vivid school colors and rich black for piping without thinning the frosting.

→ Can I make this cake ahead of time?

Yes, baking one day ahead allows the cake to cool fully and the buttercream to set. Cover and refrigerate to preserve freshness.

→ Is the cake suitable for large gatherings?

This sheet cake serves about 24 people, making it perfect for parties and events with crowds.

→ What variation can I try for chocolate lovers?

Replace ½ cup of flour in the batter with unsweetened cocoa powder for a chocolate twist on the cake.

→ Which tools help with smooth frosting and piping?

Use an offset spatula for even frosting and piping bags with writing and star tips for neat borders and decorations.

→ How should leftovers be stored?

Cover and refrigerate leftover cake for up to four days to maintain texture and flavor.

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High School Graduation Sheet Cake

Vanilla sheet cake adorned with buttercream and Class of 2026 piping—ideal for graduation festivities.

Prep Time
30 min
Cook Time
35 min
Overall Time
65 min
Created by Nora James


Skill Level Medium

Cuisine American

Makes 24 Portions

Dietary Details Meat-Free

What You'll Need

Sheet Cake

01 2 1/2 cups all-purpose flour
02 2 1/2 teaspoons baking powder
03 1/2 teaspoon salt
04 1 cup unsalted butter, room temperature
05 2 cups granulated sugar
06 4 large eggs, room temperature
07 1 tablespoon vanilla extract
08 1 cup whole milk, room temperature

Buttercream Frosting

01 1 1/2 cups unsalted butter, room temperature
02 6 cups powdered sugar, sifted
03 2 teaspoons vanilla extract
04 4 to 6 tablespoons milk or heavy cream
05 Food coloring (school colors and black for piping, as desired)

Decoration

01 Sprinkles, edible glitter, or colored sugar (optional)

Cooking Steps

Step 01

Prepare Sheet Pan: Preheat oven to 350°F. Grease and line a 13x18-inch sheet pan with parchment paper.

Step 02

Combine Dry Ingredients: Whisk flour, baking powder, and salt together in a medium bowl.

Step 03

Cream Butter and Sugar: Beat butter and granulated sugar in a large mixing bowl until light and fluffy, about 3–4 minutes.

Step 04

Add Eggs and Vanilla: Add eggs one at a time, beating thoroughly after each addition. Incorporate vanilla extract.

Step 05

Combine Wet and Dry Ingredients: Add dry ingredients to creamed mixture in three additions, alternating with milk. Begin and end with dry ingredients; mix until just combined.

Step 06

Bake Cake: Pour batter into prepared sheet pan and smooth the surface. Bake for 30–35 minutes, or until a toothpick inserted in the center comes out clean.

Step 07

Cool Cake: Cool the baked cake completely in the pan on a wire rack before frosting.

Step 08

Prepare Buttercream: Beat butter for 2 minutes on medium speed until creamy. Gradually add powdered sugar, then mix in vanilla extract and milk or cream until reaching a smooth, spreadable consistency.

Step 09

Color Frosting: Divide the buttercream and color portions for the base coating, decorative borders, and 'Class of 2026' piping with desired food coloring.

Step 10

Decorate Sheet Cake: Spread an even layer of frosting over the cooled cake. Pipe borders and the 'Class of 2026' lettering using piping bags with writing and star tips. Add sprinkles and other edible decorations as desired.

Step 11

Set Frosting: Refrigerate the decorated cake for 30 minutes to allow the buttercream to set before serving.

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Equipment Needed

  • 13x18-inch sheet pan
  • Parchment paper
  • Electric mixer
  • Mixing bowls
  • Measuring cups and spoons
  • Offset spatula
  • Piping bags and tips (round and star)
  • Wire rack

Allergy Notice

Check each ingredient for allergens and reach out to a healthcare professional if you have concerns.
  • Contains wheat (gluten), eggs, and milk (dairy). Check labels for potential allergens in food coloring and decorations.

Nutrition Information (per portion)

Sweetbatata only offers this for informational use. Please don't treat it as personalized medical advice.
  • Caloric Value: 410
  • Fats: 18 g
  • Carbohydrates: 60 g
  • Proteins: 3 g

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