Preheat oven to 350.
Combine butter, sugars, and vanilla in mixer bowl. Beat on high about 4 minutes.
In a separate bowl, mix flour, salt, and baking soda.
Add flour mixture to butter mixture a little bit at a time, while mixer is running, turning off to scrape down sides when needed. Beat together for another 4-5 minutes.
Wisk egg and extra yolks in small bowl and add that, again, while mixer is running, and continue beating another 1-2 minutes.
Reduce mixer speed to low and add in chocolate chips.
Drop dough by small scoop fulls, 1 inch apart, and bake for 10 minutes or until just starting to turn golden.
Let cookies finish baking on warm tray, on counter, until try has cooled to touch, then transfer cookies to cooling rack.
Store at room temperature for a week or in the freezer for up to 6 months.