. In a bowl, sift together the flour, baking soda, and salt.. Preheat the oven to 350°F. Line 2 baking sheets with parchment paper.. . Using a small ice cream scoop or heaping tablespoon, drop the dough onto the prepared baking sheets, spacing the dough mounds 2 inches apart.. . . Bake the cookies, 1 sheet at a time, until the bottoms and edges are lightly browned and the tops feel firm when lightly touched, 10-13 minutes.. In a large bowl, using an electric mixer on medium speed, beat the butter, brown sugar, and granulated sugar until smooth, about 2 minutes.. Add the egg and vanilla and mix at low speed until blended.. Slowly add the flour mixture and mix just until incorporated.. Switch to a wooden spoon and stir in the chocolate chips.. Let the cookies cool on the baking sheets for 5 minutes, then transfer the cookies to wire racks to cool completely.. Makes 10–12 cookies.