1. Main
  2. Dishes
  3. High School Graduation Sheet Cake

High School Graduation Sheet Cake

Featured in: Sweet Seasonal Treats

Create a vibrant sheet cake ideal for graduation gatherings. Soft vanilla crumb pairs with rich buttercream frosting, personalized with school colors and piping Class of 2026. The cake serves a crowd and is easy to decorate, making it a showpiece for celebratory tables. Use an electric mixer for fluffier batter, divide the frosting for colorful piping, and refrigerate for a clean finish. Add sprinkles or edible glitter for extra flair. Best served chilled, this cake stays moist and festive for several days. Pair with sparkling drinks to enhance the occasion.

Save to Pinterest Share Recipe Email Print Page Skip to Recipe Save it for later
Updated on Mon, 16 Mar 2026 11:23:00 GMT
Festive vanilla sheet cake with creamy buttercream and Class of 2026 piping, perfect for graduation celebrations. Save to Pinterest
Festive vanilla sheet cake with creamy buttercream and Class of 2026 piping, perfect for graduation celebrations. | frostkettle.com

Ingredients

  • Gives a light crumb and structure—make sure to measure by spoon and level for accuracy.
  • Ensures even lift throughout the sheet cake, so every slice is airy.
  • Balances out the sweetness and enhances flavors.
  • Room temperature is key; cold butter won’t fluff up and warm butter melts too quickly.
  • Adds sweetness and a subtle golden color.
  • Room temperature eggs incorporate smoothly; cold ones might cause the batter to separate.
  • The core flavor—pure vanilla is worth the splurge.
  • Keeps the cake moist; use whole milk, not low-fat, for richer texture.
  • Needs to be sifted to avoid lumpy frosting.
  • Gel formulas keep frosting thick and vibrant—liquid colors can dilute it.
  • Add festive flair, but best added once the frosting has set just a little.

What's for Dinner Tonight? 🤔

Stop stressing. Get 10 fast recipes that actually work on busy nights.

Free. No spam. Just easy meals.

Instructions

Save to Pinterest
| frostkettle.com

Tired of Takeout? 🥡

Get 10 meals you can make faster than delivery arrives. Seriously.

One email. No spam. Unsubscribe anytime.

Making Buttercream That Holds Its Shape

Perfecting the Sheet Cake Texture

Graduation Decorations—Fun, Bold, and Easy

Still Scrolling? You'll Love This 👇

Our best 20-minute dinners in one free pack — tried and tested by thousands.

Trusted by 10,000+ home cooks.

  • Moist vanilla sheet cake decorated with vibrant buttercream and Class of 2026 piping, ideal for graduation parties. Save to Pinterest
    Moist vanilla sheet cake decorated with vibrant buttercream and Class of 2026 piping, ideal for graduation parties. | frostkettle.com

    Recipe Questions & Answers

    → How can I make the cake extra moist?

    Ensure butter and eggs are room temperature before mixing. Avoid overmixing and bake just until a toothpick comes out clean.

    → How do I achieve vibrant school colors in the frosting?

    Use gel food coloring for intense hues without affecting frosting texture. Mix small amounts until desired color is reached.

    → Can I prepare the cake ahead of time?

    Yes, bake and frost the cake the day before. Store covered in the refrigerator for up to 4 days for freshness.

    → How can I customize the decoration?

    Add edible glitter, colored sprinkles, or sugar to highlight school spirit. Personalize piping with different tips and fonts.

    → Is there a chocolate variation?

    Substitute ½ cup of flour with unsweetened cocoa powder to create a chocolate sheet cake version.

    → What tools are essential for decorating?

    You'll need piping bags with star and writing tips, an offset spatula, mixer, and parchment for best results.

20-Minute Dinner Pack — Free Download 📥

10 recipes, 1 shopping list. Everything you need for a week of easy dinners.

Instant access. No signup hassle.

High School Graduation Sheet Cake

Vanilla sheet cake with buttercream and celebratory Class of 2026 piping, ideal for graduation festivities.

Prep Duration
30 minutes
Time to Cook
35 minutes
Overall Time
65 minutes
Created by Nora Whitman


Skill Level Medium

Cuisine American

Makes 24 Serving Size

Dietary Information Meatless

What You 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, as needed)

Decoration

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

How-To 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 together flour, baking powder, and salt in a medium bowl.

Step 03

Cream Butter and Sugar: Beat butter and sugar in a large bowl with an electric mixer until light and fluffy, about 3–4 minutes.

Step 04

Incorporate Eggs and Vanilla: Add eggs one at a time, beating well after each. Blend in vanilla extract.

Step 05

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

Step 06

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

Step 07

Bake: Bake 30–35 minutes, or until a toothpick inserted in the center comes out clean.

Step 08

Cool Cake: Remove from oven and let cake cool completely in the pan on a wire rack.

Step 09

Prepare Frosting: Beat butter with an electric mixer on medium speed until creamy, about 2 minutes. Gradually add powdered sugar, mixing until smooth. Add vanilla and enough milk or cream to reach a spreadable texture.

Step 10

Tint Frosting: Divide frosting as needed. Tint portions for base color, borders, and Class of 2026 piping with food coloring.

Step 11

Decorate: Spread a smooth layer of frosting over cooled cake. Use piping bags fitted with round and star tips to pipe borders and 'Class of 2026'. Finish with sprinkles or edible decorations if desired.

Step 12

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

You Just Made Something Great 👏

Want more like this? Get my best easy recipes — free, straight to your inbox.

Join 10,000+ home cooks. No spam.

Tools You'll Need

  • 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 Info

Review every ingredient for allergens. Ask a healthcare professional if unsure.
  • Contains wheat (gluten), eggs, and milk (dairy). Check ingredient labels on food coloring and decorations for hidden allergens.

Nutrition Details (Each Serving)

Given for informational purposes, this isn't medical advice.
  • Energy Value: 410
  • Fats: 18 g
  • Carbohydrates: 60 g
  • Proteins: 3 g

Cooking Shouldn't Be Hard ❤️

Get a free recipe pack that makes weeknight dinners effortless. Real food, real fast.

Free forever. Unsubscribe anytime.

© Frost Kettle. All content protected.