Perfect Chocolate Chip Cookies

Preheat oven to 350°F (180°C)
Line 2 baking sheets with parchment
1/2 cup unsalted butter, at room temperature beat
until smooth
mix in mix stir in scoop
2 in. apart
bake
350°F (180°C)
10–13 min
cool
5 min,
then racks
1/2 cup firmly packed light brown sugar
6 Tbs. granulated sugar
1 egg
1 tsp. vanilla extract
1 1/4 cups unbleached all-purpose flour sift
1 tsp. baking soda
1/2 tsp. salt
2 1/2 cups semisweet chocolate chips