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Cookie Birthday Cake

Cookie Birthday Cake Recipe

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Prep Time 20 minutes
Cook Time 20 minutes
Total Time 40 minutes
Servings: 10 servings
Calories: 430
Ingredients Method Notes

Ingredients
  

  • 1/2 cup unsalted butter, melted
  • 1/2 cup packed light brown sugar
  • 1/4 cup granulated sugar
  • 1 large egg, room temperature
  • 1 1/2 teaspoons vanilla extract
  • 1 1/4 cups all-purpose flour
  • 1/2 teaspoon baking soda
  • 1/2 teaspoon salt
  • 1 cup semisweet chocolate chips
  • 1/2 cup unsalted butter, softened (for frosting)
  • 1 1/2 cups powdered sugar
  • 1/2 teaspoon vanilla extract (for frosting)
  • 1 to 2 tablespoons milk or heavy cream
  • Rainbow sprinkles, for decorating

Method
 

  1. Preheat oven to 350°F (175°C) and grease a 9-inch cake pan. Whisk melted butter, brown sugar, and granulated sugar until smooth, then add egg and vanilla. Stir in flour, baking soda, salt, and chocolate chips until just combined. Press into pan, dot with extra chips.
  2. Bake 18 to 22 minutes until edges golden and center set but soft. Cool completely in pan.
  3. Beat softened butter until creamy, then add powdered sugar, vanilla, and 1 tablespoon milk. Beat until smooth, adding more milk if needed for spreadable consistency.
  4. Spread frosting over cooled cookie, scatter sprinkles, and slice.

Notes

For the cleanest slices, chill the frosted cake for 10 minutes before cutting. A springform pan makes unmolding extra easy, but any 9-inch round pan lined with parchment will release just fine.