Preheat the oven to 375℉. Line two baking sheets with Silpat liners or parchment paper.
In the bowl of a stand mixer, combine brown and white sugar, butter, shortening, salt, vanilla extract, vinegar, and baking soda. Beat until smooth and creamy and ingredients are incorporated.
Beat in the egg until thoroughly mixed in, scraping the side and bottom of the bowl.
Mix in the flour and then the chocolate chips.
Using a cookie scoop, scoop dough onto prepared baking sheets, leaving 2" between dough balls.
Bake cookies 10 - 12 minutes, until edges begin to brown and center is set.
Remove from oven and cool on the pan 5 -9 minutes until they've set enough to move without breaking.
Repeat with remaining cookie dough.
Notes
Adapted from King Arthur Baking Company.If you want more cookies, use a smaller scoop and bake for a few minutes less.