From Sally’s Baking Addiction

2 cups flour

2 teaspoons cornstarch

1 teaspoon baking soda

½ teaspoon salt

¾ cup unsalted butter, room temperature

¾ cup packed brown sugar

¾ cup granulated sugar

1 large egg, room temperature

2 teaspoons vanilla

½ cup semisweet chocolate chips

1 cup mini chocolate chips

Preheat oven to 350°F. Lightly grease a large cookie sheet, or pizza pan (or cover with parchment or a Silpat).

In a medium mixing bowl, whisk together flour, cornstarch, baking soda, and salt; set aside.

Using a stand mixer fitted with the paddle attachment, cream the butter and sugars on medium speed until smooth, about 2 minutes. Add eggs and beat on high, about 1 minute. Add vanilla extract; mix until combined.

Add dry ingredients and mix on low until combined. Fold in chocolate chips. With floured hands form go into a large, flat round, transfer to prepared pan, and flatten to ½” thick. Scatter and press additional chocolate chips into top, if desired.

Bake for 22 to 25 minutes or until puffed and lightly browned on top. If you want the cookie a little crisper on the edges, bake for a couple of extra minutes. Allow to cool in the pan set on a wire rack before slicing into, hopefully decent looking triangles.