Pre heat your oven to 160c and line a baking sheet with baking paper.
Place your butter and sugars in the bowl of a stand mixer (you can use an electric hand mixer too).
Beat your butter and sugars until they are light and fluffy.
Add in your egg and vanilla and beat until combined.
Add in your flour and bicarb and continue to beat until the flour is thoroughly mixed through.
Fold in your chocolate chips (and macadamias if using) until they are dispersed through the mixture.
Take 1 tablespoon of your dough and form it into a ball, placed on the tray about 1-2 inches apart.
Place in the oven to bake for 10-15 minutes (mine were done at about 12).