Preheat the oven to 375. Grease or line 2 cookie sheets.
1 cup plus 2 Tbs all-purpose flour
1/2 tsp baking soda
Beat in a large bowl until well-blended:
1/2 cup (1 stick) unsalted butter, softened
1/2 cup sugar
1/2 cup packed light brown sugar
Add and beat until well combined:
1 large egg
1/4 tsp salt
1 1/2 tsp vanilla
1 cup chocolate chips
Stir in the flour mixture until well-blended and smooth. Stir in 1 cup chocolate chips.
Drop the dough by heaping teaspoonfuls about 2 inches apart on the cookie sheets. Bake, 1 sheet at a time, until the cookies are just slightly colored on top and the edges are brown, about 8 – 10 minutes. Let stand briefly, then remove to a rack to cool.
Makes about 36 cookies.