I use this cookie dough for several different cookie shapes and it is a favorite of mine. And what I love the most about it, it gets better over time. So you can make this a couple of days ahead and just store it in an airtight container.
As I often mention, I adore hazelnuts. And I add them in different batters whenever it is appropriate because hazelnuts make every cake taste better. If it is a chocolate one. And sometimes even if it is not.
I always like to emphasise toasting the nuts in a hot pan for a couple of minutes, it enhances natural nut oils to release and enrich the flavour. So, do not skip that part if adding nuts.