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Perfect Confetti Sheet Cake Recipe with Easy Class of 2026 Buttercream Lettering Tutorial

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A colorful and moist confetti sheet cake perfect for celebrations, topped with a creamy vanilla buttercream frosting and personalized lettering.

Ingredients

Scale
  • 2 ½ cups (315g) all-purpose flour, sifted
  • 2 ½ tsp baking powder
  • ½ tsp salt
  • 1 cup (227g) unsalted butter, softened
  • 1 ¾ cups (350g) granulated sugar
  • 4 large eggs, room temperature
  • 1 tbsp pure vanilla extract
  • 1 cup (240ml) whole milk, room temperature (can substitute with almond or oat milk)
  • ¾ cup (120g) rainbow sprinkles (firm, non-melting)
  • 1 cup (227g) unsalted butter, softened (for frosting)
  • 4 cups (480g) powdered sugar, sifted
  • 2 tsp vanilla extract (for frosting)
  • 2–4 tbsp whole milk or cream (for frosting)
  • Gel food coloring (optional) for lettering colors

Instructions

  1. Preheat oven to 350°F (175°C). Grease and flour a 9×13-inch sheet pan or line with parchment paper.
  2. In a medium bowl, whisk together sifted flour, baking powder, and salt.
  3. In a large bowl, beat softened butter and granulated sugar on medium speed until pale and fluffy, about 3-4 minutes.
  4. Beat in eggs one at a time, mixing well after each addition, then add vanilla extract.
  5. Reduce mixer speed to low. Add dry ingredients in three parts, alternating with milk in two parts, beginning and ending with dry ingredients. Mix just until combined.
  6. Gently fold in rainbow sprinkles with a spatula, avoiding overmixing.
  7. Pour batter into prepared pan and smooth evenly. Tap pan gently to release air bubbles.
  8. Bake for 30-35 minutes or until a toothpick inserted in the center comes out clean with a few moist crumbs.
  9. Cool cake in pan for 15 minutes, then transfer to a cooling rack to cool completely.
  10. For buttercream, beat softened butter on medium speed until creamy (about 2 minutes). Gradually add powdered sugar, one cup at a time, beating on low speed until incorporated.
  11. Add vanilla extract and 2 tablespoons milk, then beat on high for 3 minutes until light and fluffy. Adjust milk for desired consistency.
  12. Divide buttercream into bowls and mix in gel food coloring if desired.
  13. Fill piping bags fitted with small round tips and practice lettering on parchment paper.
  14. Spread a thin crumb coat of buttercream over cooled cake. Chill for 20 minutes if desired.
  15. Pipe ‘Class of 2026’ lettering on top. Let buttercream set slightly before slicing and serving.

Notes

Use firm, non-melting sprinkles labeled as ‘jimmies’ to prevent color bleeding. For best buttercream consistency, use softened but not melted butter. If buttercream is too stiff, add milk one teaspoon at a time or soften briefly in microwave. Practice piping on parchment paper before decorating. To prevent sprinkles from sinking, toss them in a little flour before folding in.

Nutrition

Keywords: confetti cake, sheet cake, buttercream lettering, celebration cake, graduation cake, easy cake recipe, colorful cake

Find it online: https://dahliadishes.com/perfect-confetti-sheet-cake-recipe-with-easy-class-of-2026-buttercream-lettering-tutorial/