I usually make a double batch of these, because more cookies are better. And with the help of my brother, half of them end up disappearing as soon as they're baked. Also, there are no eggs in the dough, so feel free to eat as much unbaked-cookie-goodness as you like!
Recipe Adapted From: Dorie Greenspan via Confessions of a Bake-A-Holic
Ingredients
143g butter
124g brown sugar
125g white sugar
1 tsp vanilla essence/extract
1 tsp salt (sea salt is recommended - add less or more depending on how salty you want the biscuits to be)
142g dark chocolate chips OR chopped chocolate chunks
194g flour
33g cocoa powder
1/2 tsp baking soda
Method
1. Beat the butter until it's soft and fluffy. Since I'm used to margarine, if I'm planning to make something using real butter (like these cookies) I usually leave a block out on the kitchen bench overnight so it gets soft; it's very annoying to try and beat cold butter into submission.2. Add the brown sugar, white sugar, vanilla essence and salt and beat until fluffy and light.
If you're not using an electric mixer (e.g. a KitchenAid) for this, it's best to sift the cocoa powder so you don't get unmixed clumps of powder in your baked biscuits.
6. Refrigerate the dough for at least 3 hours. When you're about ready to bake the cookies, preheat the oven to 160 degrees C/325 F.
7. Cut the logs into 1 - 1.5cm rounds and place them on baking trays lined with baking paper/silicone mats or whatever you use. Make sure there's quite a bit of space between them, they do spread a bit. If your rounds are falling apart, just squish them back together.