-
Preheat oven to 375.
-
In a stand mixer, beat butter and shortening together until combined (about a minute). Add sugars and beat another minute or two. Add vanilla and egg. Beat again (I know, so much beating here. . . ).
-
Mix in the chocolate chips.
-
Add the flour, soda, and salt. Mix JUST until combined. It will look over-floured for a few seconds, but should come together fairly quickly.
-
Scoop golf-ball size spoonfuls of dough onto cookie sheet, sprinkle each ball with a pinch of kosher or sea salt and bake for 10-11 minutes (mine are 11 minutes, every time).
-
They should be light-colored and puffed when they come out of the oven, but dry-looking (not shiny or wet). Let cool on the pan for about 5 minutes then transfer to cooling rack.