the perfect chocolate chip cookie

as seen on good things utah....2 sticks butter
2 1/2 cups all purpose flour
1 teaspoon salt
1 teaspoon baking soda
1/4 cup granulated sugar
1 1/4 cups packed brown sugar
1 egg
1 egg yolk
2 tablespoons milk
1 1/2 teaspoons vanilla extract
12 oz bag milk chocolate chips

Heat oven to 350 degrees F.
Melt the butter in a medium saucepan over low heat.

Sift together the flour, salt, and baking soda and set aside.
Pour the melted butter in the mixer's work bowl. Add the sugar and brown sugar. Cream the butter and sugars on medium speed. Add the egg, yolk, 2 tablespoons milk and vanilla extract and mix until well combined.

Slowly incorporate the flour mixture until thoroughly combined. Stir in the chocolate chips. Chill the dough*, then scoop onto parchment-lined baking sheets, 6 cookies per sheet. Bake for 11 minutes or until golden brown, checking the cookies after 5 minutes. Rotate the baking sheet for even browning.

*the secret is to chill the dough overnight. the cookies turn out fluffier and chewier! (are those even real words?)