Sift your dry ingredients. (flours, baking powder, baking soda, salt)
In a bowl, lightly mix the cubed cold butter using a mixer. Add the sugars and continue mixing. Once combined, add in the chocolate chips and the nuts. Continue mixing using a spatula.
Gradually add the flour. Mix until combined. Then add beaten eggs one at a time. Mix until combined.
Gradually add the dry ingredients. Once combined, add eggs one
Portion the dough into around 150g. Refrigerate for 90 mins.
When ready to bake, oven must be pre-heated to 220c. Bake for about 26 mins.