Simple Graduation Sheet Cake (Printable)

Moist vanilla sheet topped with creamy buttercream and festive Class of 2026 piping decorations.

# What You'll Need:

→ Cake

01 - 2½ cups all-purpose flour
02 - 2½ teaspoons baking powder
03 - ½ teaspoon salt
04 - 1 cup unsalted butter, softened
05 - 1¾ cups granulated sugar
06 - 4 large eggs, room temperature
07 - 1 tablespoon vanilla extract
08 - 1 cup whole milk, room temperature

→ Buttercream Frosting

09 - 1 cup unsalted butter, softened
10 - 4 cups powdered sugar, sifted
11 - ¼ cup whole milk
12 - 2 teaspoons vanilla extract
13 - Pinch of salt
14 - Food coloring for tinting

→ Decoration

15 - Food coloring for piping
16 - Sprinkles or edible decorations, optional

# How to Make It:

01 - Preheat oven to 350°F. Grease a 9x13-inch sheet pan and line with parchment paper.
02 - In a medium bowl, whisk together flour, baking powder, and salt until evenly distributed.
03 - In a large bowl, beat softened butter and granulated sugar together for approximately 3 minutes until light and fluffy in texture.
04 - Add eggs one at a time to the butter mixture, beating thoroughly after each addition. Mix in vanilla extract until fully combined.
05 - Gradually add the flour mixture in three portions, alternating with milk, beginning and ending with flour. Mix until just combined without overmixing.
06 - Pour batter into prepared pan and smooth the top surface with a rubber spatula.
07 - Bake for 30 to 35 minutes until a toothpick inserted into the center comes out clean. Cool completely in pan on a wire rack.
08 - Beat softened butter until creamy. Gradually add powdered sugar, milk, vanilla, and salt. Beat for 3 to 5 minutes until fluffy. Divide and tint portions with food coloring as desired.
09 - Spread an even layer of buttercream frosting over the completely cooled cake using an offset spatula.
10 - Transfer colored buttercream to piping bags fitted with small round tips. Pipe Class of 2026 on cake top. Add sprinkles or edible decorations as desired.

# Expert Suggestions:

01 -
  • Feeds a crowd without keeping you in the kitchen all afternoon—sheet cakes are honestly the most practical party move.
  • The buttercream frosting is silky enough to pipe cleanly but forgiving if your lines aren't museum-perfect.
  • You can personalize it with school colors, make it look pressed and polished, and still have time to breathe before guests arrive.
02 -
  • Room temperature ingredients are the invisible backbone of this recipe—cold eggs, cold milk, and cold butter will fight against a smooth batter and result in a denser, grainier cake than you want.
  • Don't open the oven door during baking out of curiosity; a sheet cake is forgiving but sudden temperature changes can cause sinking, and you'll regret it when you slice into a sunken center.
  • The frosting must be at the right consistency to pipe—too soft and your class year will slump into a blob, too stiff and you'll struggle with the piping bag and risk cracking the cake underneath.
03 -
  • Use gel food coloring instead of liquid—it won't thin your frosting and the colors blend smoother and more vividly for those school colors to really pop.
  • If you mess up the piping, you can gently smooth it out with a warm, damp knife and start over; buttercream is forgiving that way, which is why this cake is perfect for decorating under pressure.
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