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A stack of 3 chewy chocolate chip cookie bars with a glass of milk.

Chocolate Chip Cookie Bars

Chocolate chip cookie bars are soft, chewy, and easier than making traditional cookies. Skip the process of chilling the dough and forming it into balls - and bake your cookie dough in a 9x13 inch pan instead. 
Course Dessert
Cuisine American
Keyword 9x13, Cookie Bars
Prep Time 15 minutes
Cook Time 35 minutes
Total Time 50 minutes
Servings 15 bars
Calories 392kcal


  • 3 cups all-purpose flour
  • 1 tablespoon cornstarch
  • 1 teaspoon baking powder
  • ½ teaspoon salt
  • 1 cup unsalted butter , melted & cooled
  • 1 cup brown sugar
  • ½ cup white sugar
  • 2 large eggs
  • 2 large egg yolks , in addition to the other 2 eggs (discard the whites)
  • 2 teaspoons vanilla extract
  • 1 ½ cups chocolate chips


  • Preheat the oven to 350F degrees.
  • Line a 9x13 inch pan with parchment paper leaving an overhang around the sides. Or line with aluminum foil and lightly spray with cooking spray.
  • In a medium bowl whisk together the flour, cornstarch, baking powder and salt.
  • In a large bowl whisk together the melted butter and sugars (or use an electric mixer).
  • Whisk/beat in the eggs, egg yolks and vanilla extract.
  • Stir (or beat) in the flour mixture about ½ at a time.
  • Fold in the chocolate chips using a rubber spatula or wooden spoon.
  • Spoon the batter into the lined pan and spread the top smooth.
  • Bake in the preheated oven for 32-37 minutes, or until the top looks set.* Baking for longer will lead to less gooey/chewy bars.
  • Cool fully before cutting for clean slices, or cool for at least 30 minutes before slicing.


*Baking in a ceramic or glass pan generally means the bars will bake for 3-5 minutes longer.
This recipe can be easily halved and baked in an 8x8 or 9x9 inch pan. The bake time will be about the same, or a little shorter. 
Store in an airtight container at room temperature for up to 4 days. Bars freeze well and can be thawed in the fridge. 


Calories: 392kcal | Carbohydrates: 53g | Protein: 5g | Fat: 18g | Saturated Fat: 11g | Cholesterol: 88mg | Sodium: 107mg | Potassium: 85mg | Fiber: 1g | Sugar: 32g | Vitamin A: 490IU | Vitamin C: 0.1mg | Calcium: 56mg | Iron: 1.7mg