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Vibrant Dr. Seuss Rainbow Sprinkle Sheet Cake

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A colorful and moist sheet cake layered with vibrant rainbow colors and topped with creamy vanilla frosting and rainbow sprinkles. Perfect for kids’ parties and celebrations.

Ingredients

Scale
  • 2 ½ cups (312.5g) all-purpose flour
  • 2 ½ teaspoons baking powder
  • ½ teaspoon salt
  • 1 cup (227g) unsalted butter, softened
  • 1 ¾ cups (350g) granulated sugar
  • 4 large eggs, room temperature
  • 1 tablespoon pure vanilla extract
  • 1 cup (240ml) sour cream, full-fat
  • ½ cup (120ml) whole milk
  • Gel food coloring in red, orange, yellow, green, blue, and purple
  • 1 cup (227g) unsalted butter, softened (for frosting)
  • 4 cups (480g) powdered sugar, sifted
  • 2 teaspoons pure vanilla extract (for frosting)
  • 2–3 tablespoons (30-45ml) whole milk or heavy cream (for frosting)
  • Pinch of salt (for frosting)
  • 1 cup rainbow sprinkles

Instructions

  1. Preheat oven to 350°F (175°C). Grease a 9×13-inch sheet pan and line with parchment paper, leaving an overhang on two sides.
  2. In a medium bowl, whisk together flour, baking powder, and salt. Set aside.
  3. In a mixing bowl, beat softened butter and granulated sugar on medium speed for 3-4 minutes until light and fluffy.
  4. Add eggs one at a time, beating well after each addition. Stir in vanilla extract.
  5. Reduce mixer speed to low. Add dry ingredients in three parts, alternating with sour cream and milk, starting and ending with dry ingredients. Mix just until combined.
  6. Divide batter evenly into six small bowls. Add gel food coloring to each bowl (red, orange, yellow, green, blue, purple) and fold gently until vibrant.
  7. Pour each colored batter in stripes across the prepared pan, layering carefully to create a rainbow effect.
  8. Bake for 35-40 minutes or until a toothpick inserted in the center comes out clean. Cake should spring back lightly when touched.
  9. Cool cake in pan on wire rack for 15 minutes, then lift out using parchment paper and cool completely.
  10. For frosting, beat softened butter on medium speed until creamy. Gradually add powdered sugar, mixing well after each addition.
  11. Add vanilla, salt, and milk or cream 1 tablespoon at a time until spreadable consistency is reached.
  12. Spread frosting evenly over cooled cake using an offset spatula.
  13. Generously sprinkle rainbow sprinkles over the top and press some into the sides for decoration.
  14. Slice with a sharp knife, wiping clean between cuts, and serve.

Notes

Use gel food coloring for vibrant colors without thinning the batter. Avoid overmixing after adding dry ingredients to keep cake moist. Rotate pan halfway through baking if oven has hot spots. Let cake cool completely before frosting to prevent melting. Store leftovers wrapped tightly in refrigerator up to 4 days or freeze slices up to 3 months.

Nutrition

Keywords: rainbow cake, sprinkle cake, sheet cake, kids party cake, colorful cake, vanilla cake, easy cake recipe

Find it online: https://twinkletaste.com/vibrant-dr-seuss-rainbow-sprinkle-sheet-cake-easy-recipe-to-impress-kids/