In a medium bowl, whisk together flour, baking soda and salt. Set aside.
In a large bowl, cream together brown sugar and butter. Scape down sides of bowl as needed.
Add egg and vanilla to butter and mix until combined.
Gradually stir dry ingredients into butter mixture until just combined.
Stir in chocolate chips then chill dough for 30 minutes.
Preheat oven to 350°F and line a baking sheet with parchment paper.
Once chilled, scoop 6 heaping tablespoons of cookie dough onto the baking sheet and bake 17 minutes or until cookies are golden brown. Repeat with remaining dough.
Enjoy cookies warm with a glass of milk or a scoop of ice cream.