Name: Chocolate Chip Cookie Bars
Prep time: 10 min
Cook time: 40 min
Total time: 50 min
Yield: 16 cookie bars
Ingredients: 2¼ cups all-purpose flour ((270g)); 1 tablespoon cornstarch; 1 teaspoon baking soda; 1 teaspoon salt; ¾ cup unsalted butter (melted and cooled slightly (170g)); 1 cup packed light brown sugar ((220g)); ⅔ cup granulated sugar ((133g)); 2 large eggs (room temperature); 1 tablespoon vanilla extract; 2 cups semi-sweet chocolate chips (divided (360g))

Method

8 steps

Preheat oven and line an 8x8 inch dish with parchment paper or foil.
Whisk together 2¼ cups all-purpose flour, 1 tablespoon cornstarch, 1 teaspoon baking soda, and 1 teaspoon salt. Set aside.
In a large bowl, combine ¾ cup melted butter, ⅔ cup granulated sugar, and 1 cup packed light brown sugar. Mix until a thick slurry forms.
Add 1 tablespoon vanilla extract and 2 room temperature eggs to the butter and sugar mixture. Whisk until combined.
Fold the dry ingredients into the wet mixture using a spatula until mostly incorporated.
Add 2 cups semi-sweet chocolate chips and, optionally, chopped toasted nuts if desired, and fold to combine.
Pour the batter into the prepared dish and bake for 30 minutes for a gooey center or an additional 5-10 minutes for a more set texture.
Remove from oven and let set. Once cooled, lift out using the parchment paper and cut into bars.

Recipe notes

Helpful tips

Allow the melted butter to cool slightly before mixing in the eggs.
Reserve a handful of chocolate chips for the top.
Bake for about 30 minutes for a gooier centre or slightly longer for firmer bars.
Allow the slab to set before lifting it from the tin and slicing.