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Perfect Birthday Cake Skillet Cookie Recipe with Easy Sprinkle Frosting

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A quick and easy skillet cookie that combines the soft, chewy texture of a cookie with the festive fun of birthday cake sprinkles and a light sprinkle frosting. Perfect for last-minute celebrations or any day you want a nostalgic sweet treat.

Ingredients

Scale
  • 1 cup (225g) unsalted butter, softened
  • 1 cup (200g) granulated sugar
  • 1/2 cup (100g) brown sugar, packed
  • 2 large eggs, room temperature
  • 2 teaspoons pure vanilla extract
  • 2 1/2 cups (315g) all-purpose flour
  • 1 teaspoon baking soda
  • 1/2 teaspoon salt
  • 1/2 cup (90g) rainbow sprinkles
  • 1 cup (120g) powdered sugar
  • 2 tablespoons unsalted butter, softened
  • 2 tablespoons milk (whole or 2%)
  • 1/2 teaspoon vanilla extract
  • 2 tablespoons rainbow sprinkles (for topping)

Instructions

  1. Preheat your oven to 350°F (175°C). Grease a 10-inch cast iron skillet with butter or non-stick spray.
  2. In a large bowl, beat 1 cup softened butter with 1 cup granulated sugar and 1/2 cup packed brown sugar until light and fluffy, about 3 to 4 minutes.
  3. Beat in 2 large eggs one at a time, then stir in 2 teaspoons vanilla extract until smooth and creamy.
  4. In a separate bowl, whisk together 2 1/2 cups all-purpose flour, 1 teaspoon baking soda, and 1/2 teaspoon salt.
  5. Gradually add the dry ingredients to the wet mixture, mixing just until combined.
  6. Gently fold 1/2 cup rainbow sprinkles into the dough using a spatula.
  7. Press the dough evenly into the prepared skillet, covering the bottom.
  8. Bake for 25 to 30 minutes until edges are golden and crisp but center is still slightly soft.
  9. While baking, whisk together 1 cup powdered sugar, 2 tablespoons softened butter, 2 tablespoons milk, and 1/2 teaspoon vanilla extract until smooth and spreadable.
  10. Once the cookie has cooled about 10 minutes, spread the sprinkle frosting evenly over the top and scatter 2 tablespoons fresh rainbow sprinkles before the frosting sets.
  11. Let the frosting firm up a few minutes, then slice and serve warm or at room temperature.

Notes

Use fresh sprinkles to avoid dull colors. If frosting is too soft, chill for 5 minutes. Tent with foil if edges brown too fast. For a thicker cookie, chill dough for 30 minutes before baking. Gluten-free and dairy-free substitutions are possible but will alter texture and flavor.

Nutrition

Keywords: birthday cake skillet cookie, sprinkle frosting, easy dessert, skillet cookie, quick birthday dessert, chewy cookie, festive dessert

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