I’ve tried many, and this is my favourite recipe for chocolate chip cookies. I remember my grandma teaching me that they key to the perfect cooking was the “under-bake”. I was about eight years old when she accused me of burning the cookies (which were slightly over baked by her standards). That's the only time we ever baked together. Harsh, perhaps, but I have never over baked another cookie!
To achieve the perfect consistency, pull the cookies out of the oven when the edges just start to brown and they still look puffy (even slightly raw). Let them cool and settle on the hot cookie sheet. For 70g balls, I cook my cookies closer to 12 minutes on a light coloured cookie sheet (darker sheets will cook the cookies faster).
For the lake, I often make and freeze the dough in the city and then bake them at the lake.
I conducted a taste test with this dough - changing only the size of the cookies. Everyone preferred the consistency of the larger cookie.
One final note - I tend to use dark chocolate (up to 70%) but this is simply a preference!