Simple Graduation Sheet Cake (Printable Version)

Moist vanilla sheet cake topped with creamy buttercream and celebratory piping details.

# Components:

→ Cake

01 - 2 ½ cups all-purpose flour
02 - 2 ½ teaspoons baking powder
03 - ½ teaspoon salt
04 - 1 cup unsalted butter, softened
05 - 1 ¾ 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

# Method Steps:

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.
03 - In a large bowl, beat butter and sugar together until light and fluffy, approximately 3 minutes.
04 - Add eggs one at a time, beating well after each addition. Mix in vanilla extract.
05 - Gradually add flour mixture in three parts, alternating with milk, beginning and ending with flour. Mix until just combined.
06 - Pour batter into prepared pan and smooth the top. Bake for 30 to 35 minutes, or until a toothpick inserted into the center comes out clean.
07 - Allow cake to cool completely in the pan on a wire rack.
08 - Beat butter until creamy. Gradually add powdered sugar, milk, vanilla, and salt. Beat for 3 to 5 minutes until fluffy. Tint portions with food coloring as desired.
09 - Spread an even layer of buttercream over the cooled cake.
10 - Use colored buttercream in a piping bag fitted with a small round tip to pipe Class of 2026 on top. Add sprinkles or other decorations as desired.

# Expert Advice:

01 -
  • The cake stays impossibly moist even days later, which means you can actually bake it ahead without that dry, forgotten-in-the-back-of-the-fridge feeling.
  • One sheet pan means minimal cleanup before the party actually starts, leaving you time to ice your hands and practice your piping.
  • The buttercream is forgiving and holds color beautifully, so school colors or favorite hues really pop without any fussy techniques.
02 -
  • Room temperature ingredients (especially eggs and milk) blend into the batter so much more smoothly than cold ones—it's the difference between a velvety crumb and one with little lumps.
  • Don't open the oven door before 28 minutes or your cake might fall flat, and a toothpick that comes out completely dry means you've slightly overbaked—aim for moist crumbs still clinging to it.
03 -
  • Invest in a small offset spatula for frosting—it makes spreading smooth and even so much easier than a regular knife, and it costs less than a coffee.
  • If your frosting seems too soft to pipe, refrigerate it for 10–15 minutes until it firms up slightly; if it's too stiff, let it sit at room temperature for a few minutes.
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