01 - 
                Set your oven to 200°C (400°F) and let it warm up.
              
              
              
                02 - 
                Toss the soft butter chunks in a bowl and start beating slowly. Dump in both sugars and mix at medium speed till smooth and creamy, for about a minute.
              
              
              
                03 - 
                Drop the eggs into your butter-sugar mix and beat for around 30 seconds at medium speed, just till they blend in.
              
              
              
                04 - 
                Stop the mixer. Throw in homemade cake flour, plain flour, powder for baking, soda for baking, and sea salt. Turn mixer to low till everything's mixed together.
              
              
              
                05 - 
                Use a rubber spatula to gently fold the walnuts and chocolate pieces into your batter until they're spread out evenly.
              
              
              
                06 - 
                Split your dough into 8 equal balls, about 170g each. Just roughly shape them with your hands without pressing them flat.
              
              
              
                07 - 
                Put 4 dough balls on each baking tray and stick them in the oven for 11 minutes. They should look a bit golden on top and bottom. Don't leave them in too long!
              
              
              
                08 - 
                Let your cookies sit for 15 minutes to cool down before you dig in.