Mrs. Fields Chocolate Chip Cookies {Copycat}

dark brown sugar, firmly packed

granulated sugar

cold salted butter, cut into 1/2-inch cubes (cut each stick into about 16 pieces; if using unsalted butter increase the salt listed below from 1/4 to 1/2 teaspoon)

large eggs

vanilla extract

all-purpose flour

baking soda

salt

semi-sweet chocolate chips