Preheat the oven to 190°C.
In a bowl combine flour, salt and baking soda.
In another bowl mix together butter and both sugars until light and fluffy. Add the egg and vanilla extract, beat for 1 min.
With the mixer on slow speed, start adding flour and mix just until it is incorporated and you can’t see any dry bits.
Now add in macadamia nuts and white chocolate then blitz the mixer for 3 seconds so that the pieces are evenly distributed.
Line a baking sheet with parchment paper.
Take a tablespoon of the dough and form balls with it, place them on a baking sheet about 3 cm apart. Bake for about 12 min and transfer them to a cooling rack. If you want really soft cookies, bake them for 10-11 min (they will hardly have any color on them and will seem too soft, but when they cool down they will be just right). Baking time also depends on how big you make your cookies but basically, they are baked when they develop a slightly golden color on them.