Cook the butter until you can see little brown bits at the bottom of the pan. This could take up to 10 minutes. (If it all turns brown, it’s scaled and you need to start over.) Place into a separate bowl and put it in the refrigerator to cool
Sift (or just combine — don’t tell Mary Berry, but I rarely sift) your dry ingredients (flour, baking soda, and salt)
Once your butter is cooled (almost solid again), cream it together with the sugars. Beat in the vanilla, the whole egg, and the egg yolk until light and creamy
Start adding the dry ingredients. I do this in 3 parts, blending completely in between. Add your chocolate chips and anything else you’d like; for instance: spicy pecans
If you didn’t let your butter cool long enough, your dough will be a little wet at this point. Put it back in the fridge to cool long enough to shape your cookies
Grab a handful of the dough and shape into a fat cylinder. The taller, the fatter the cookie
Bake at 325℉ for 15 minutes.
When done, if you let them sit on the baking sheet for a few minutes, they’ll get a crispy bottom…if you’re into that sort of thing