Pre-heat oven to 325°. Line two cookie sheets with parchment paper. Set aside.
In the bowl of a stand mixer, whip butter and sugar and on medium-high speed until well mixed and fluffy.
Add the salt (if not using salted butter), vanilla and flour. Beat until on medium-low speed for 2 minutes. Remove bowl from stand mixer. Add chocolate chips mix to combine.
Roll large tablespoons into balls. Flatten gently with a the back of a spoon. Place cookies on prepared cookie sheets. Bake for 15 minutes- the cookies should not be overly brown. Let cool for 5 minutes then carefully move to a wire rack, cool and serve or store in an airtight container.