01 - 
                Set your oven temperature to 200°C (400°F) to warm it up.
              
              
              
                02 - 
                Toss the butter pieces into a mixer bowl and mix on low. Pour in both sugars and crank it up to medium speed until you get a creamy texture, which takes about a minute.
              
              
              
                03 - 
                Gently add the eggs into the mix. Beat everything together on medium for around 30 seconds—don’t overdo it.
              
              
              
                04 - 
                Switch off the mixer. Then dump in the cake flour, regular flour, soda, powder, and salt. Stir everything on low until it’s all well blended.
              
              
              
                05 - 
                Use a spatula to mix in the walnut halves and those chocolate bits evenly.
              
              
              
                06 - 
                Split the dough into 8 roughly equal pieces, each about 170g. Shape them with your hands into rustic mounds—don’t flatten them out.
              
              
              
                07 - 
                Pop 4 dough mounds on each baking tray and slide them into the oven for 11 minutes. You’re aiming for slightly golden edges—don’t let them go too brown.
              
              
              
                08 - 
                Give the cookies at least 15 minutes to cool before enjoying them.