Heat oven to 160degrees and place rack in bottom 3rd of the oven - mine is just below the middle.
Cream butter and sugar on slow for about 3 mins do not overbeat - I read it makes a difference! Add the beaten egg and yolk and beat till combined again but once combined stop. I have read that overbeating may affect the mixture so I stopped when I considered that the additions were combined well in.
Sift plain flour, cocoa, salt, baking soda together and add to this mixture to the creamed butter, sugar and eggs and on slow combine.
With a wooden spoon stir in chocolate and cranberries. Drop large dessert spoonfuls on baking trays lined with baking paper - I only do four at a time to allow for spreading.
They seem to take about 14 mins to cook in my oven. For the first 7 mins I cook them on the higher tray and then move them to the lower tray for the final 7 mins. When moving them in I put the second tray on top.
The cookies should spread and look a little harder around the edges and not be too soft when you remove them from the oven. Let them cool for about 5 mins on tray before moving to a rack. If you turn them over and the just seem to be undercooked you can pop them back into the oven for a couple more minutes but watch them carefully this is often the difference between soft and chewy and crisp.
For white chocolate and macadamia cookies Use 2 cups of plain flour (omit the cocoa - but I am going to try a cocoa version next time) 200 grams of white chocolate chopped into chunks 125grams of raw macadamia
Follow the recipe for above.
Sometimes I use most of the ingredients cold - because I have a kitchenaid it can cream the butter quite well and I tend to be impatient - I also keep my flour in the freezer so it tends to make the mixture cold anyway.
If you use all room temperature ingredients then again I have read that you should refrigerate the dough for half an hour before using it. I refrigerated half the white chocolate cookie dough - to test if t here was a difference and I thought those cookies were a little higher than the non-refrigerated dough ones.