Sieve the flour, salt and baking soda. Keep aside.
In a bowl, place the butter and sugars. With a wooden spoon or an electric beater, beat the butter and sugar until pale and creamy.
Add the egg and beat until well incorporated.
Add the vanilla extract and mix well.
To this, add the dry ingredients and mix until well combined.
Add the chocochips and gently mix until uniformly distributed.
If the dough is very sticky, refrigerate for 10 minutes. Divide into two portions and roll out into 2 logs. Wrap in cling film and refrigerate for a minimum of 2 hours. Else follow any of the methods described in the write up above.
Preheat the oven to 180C.
Prepare two baking trays with a silicon mat or baking paper.
Remove the logs from the fridge, and peel off the cling film. Cut into slices 1/2 inch in thickness.
Place on prepared baking tray and bake for approximately 10 minutes until golden brown. Remove and allow to cool on a wire rack for 10 minutes. Place in airtight container.