Cream butter, sugar, essence and egg
yolk until light and creamy. Sift in flour, bicarbonate of soda
and salt. Stir in chopped macadamia nuts and chocolate chips to
mix. Divide dough into two equal portions. Roll out each
piece of dough between two nonstick parchment paper to 0.5cm
thickness. Use a fluted spring form pan to press out a round.
Mark into 8 equal wedges and with a fork lightly press the surface.
Transfer the round to the baking tray. Lightly brush with egg
wash and sprinkle with extra chopped macadamia nuts. Bake in
preheated oven at 190°C for 20 minutes or until golden brown.