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Pastel Rainbow Sprinkle Cake

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  • Author: Olivia
  • Prep Time: 30 minutes
  • Cook Time: 20 minutes per batch
  • Total Time: 1 hour 40 minutes (includes cooling and assembly)
  • Yield: 1214 servings 1x
  • Category: Dessert
  • Method: Baking
  • Cuisine: American
  • Diet: Vegetarian

Description

A soft vanilla cake infused with pastel-colored layers and a fun, festive sprinkle finish—perfect for birthdays and celebrations.


Ingredients

Units Scale
  • 2 1/2 cups all-purpose flour
  • 2 1/2 tsp baking powder
  • 1/2 tsp fine salt
  • 1 cup unsalted butter, softened
  • 1 3/4 cups granulated sugar
  • 4 large eggs
  • 1 tbsp vanilla extract
  • 1 cup milk
  • Food coloring gels (pastel pink, blue, yellow, green, etc.)
  • 45 cups vanilla buttercream or cream cheese frosting
  • 1 cup pastel rainbow sprinkles

Instructions

  1. Preheat oven to 350 °F (175 °C). Grease and line 4–6 round cake pans (6- or 8-inch) or bake in batches.
  2. Cream butter and sugar until light and fluffy (3–5 minutes). Beat in eggs one at a time, then vanilla extract.
  3. In a separate bowl, whisk together flour, baking powder, and salt.
  4. Alternately add dry ingredients and milk to the creamed mixture, starting and ending with flour. Mix until smooth.
  5. Divide batter evenly into bowls and tint each portion with a different pastel gel color.
  6. Pour into prepared pans and bake for 18–22 minutes, or until a toothpick inserted comes out clean. Cool completely.
  7. Level cake layers with a serrated knife if needed.
  8. Layer cakes with frosting between each. Frost top and sides with a thin crumb coat. Chill briefly, then apply final coat.
  9. Press pastel sprinkles gently onto sides and scatter some on top. Chill again to set.
  10. Slice and serve at room temperature for best texture.

Notes

  • Use gel food coloring for soft, vibrant pastels without altering batter consistency.
  • Make layers and frosting ahead; store separately, then assemble fresh.
  • Use a turntable for smoother frosting and more even sprinkle application.
  • Apply sprinkles with parchment paper below to catch excess.

Nutrition

  • Serving Size: 1 slice (1/14 of cake)
  • Calories: Approx. 420 kcal
  • Sugar: Approx. 38 g
  • Sodium: Approx. 150 mg
  • Fat: Approx. 22 g
  • Saturated Fat: Approx. 13 g
  • Unsaturated Fat: Approx. 7 g
  • Trans Fat: 0 g
  • Carbohydrates: Approx. 52 g
  • Fiber: Approx. 0.5 g
  • Protein: Approx. 4 g
  • Cholesterol: Approx. 85 mg