Even the Littlest Cookie Monsters Will Gobble This One Up!

This recipe has been a great hit over at The Girl Who Ate Everything. Here’s what lovely readers have said about it:


Great recipe! The cake looks delish! I make my Husband chocolate chip cookies every week, maybe I should surprise him with your cake version!

I love cookie cakes! Such a fun way to celebrate a birthday without the traditional birthday cake. Plus, who doesn’t love a gigantic chocolate chip cookie with buttercream frosting? This recipe is definitely going to come in handy.



  • 3/4 cup unsalted butter, softened to room temperature
  • 3/4 cup dark brown sugar
  • 1/4 cup sugar
  • 1 large egg, at room temperature
  • 2 teaspoons vanilla extract
  • 2 cups all-purpose flour
  • 2 teaspoons cornstarch
  • 1 teaspoon baking soda
  • 1/2 teaspoon salt
  • 1 and 1/4 cup semi-sweet chocolate chips

Buttercream Icing

  • 1/2 cup butter, softened
  • 2 cups powdered sugar
  • 1 teaspoon vanilla
  • 1 tablespoon milk




  • Preheat oven to 350 degrees and line a 9″ square pan (or your preferred pan) with parchment paper.
  • Cream the butter and sugars together on medium speed until fluffy and light in color. Mix in egg and vanilla until combined.
  • In a separate bowl, combine flour, cornstarch, baking soda and salt. On low speed, slowly mix into the wet ingredients. Dough will be thick and look like it’s not coming together but it will. Stir in chocolate chips.
  • Press dough into pan and bake for 16-20 minutes or until the edges just start to turn brown. Let cookie cool completely in pan.


  • Cream together the butter and vanilla. Blend in the sugar, one cup at a time, beating well after each addition. Beat in the milk, continue mixing until fluffy. Keep icing covered until ready to decorate.






Quick Tip: Serve with a scoop of vanilla ice-cream!

Thanks to The Girl Who Ate Everything for this creative birthday cake twist!

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