Preheat oven to 350°F; line baking sheets with parchment.
Whisk flour, baking soda, and salt in a medium bowl; set aside.
Beat butter and brown sugar in a large bowl about 3 minutes, until fluffy; mix in eggs and vanilla.
Gradually mix flour mixture into wet ingredients just until no flour streaks remain.
Fold in chocolate chips; cover and refrigerate at least 1 hour.
Scoop 2-tablespoon portions onto prepared sheets, 2 inches apart.
Bake 10-12 minutes, until edges set but centers look slightly underdone.
Cool on sheet 5 minutes; transfer to a wire rack to cool completely.