Form the red fondant into a 5cm round disc. Place it on a piece of baking paper and lay another piece of baking paper over. Use a rolling pin to roll the fondant out to about 2mm thick.
Using a cutter or the rim of a glass with a 4-5cm diameter, cut a circle. Wrap one nut completely in the fondant, smoothing it down at the join so that the nut is completely covered in red.
Repeat the rolling process with the white fondant.
Using a sharp knife, cut a 3cm crescent shape ‘beard’ and attach the beard to another macadamia by resting it on the front and pinching it at the back. Create a Santa hat by cutting a second 4-5cm circle and wrap it around the top end of the nut with the beard on it, pinching it together and cutting away any excess. Cut a 4cm strip of white fondant to wrap around the bottom edge of the hat and press a small ball on the tip to create a pom pom. Press the head to the body, squeezing gently so that they stick together. Add two eyes using the edible black pen.
For the snowman, repeat the process for two nuts as per Santa’s body but with the white fondant, wrapping both nuts completely in white fondant circles. Gently press the head to the body and add silver dragees for buttons and a little carrot nose made from the paw paw or apricot. Give the snowman eyes using the edible black pen.
To make the snow dusted trees, brush segments of rosemary sprigs with a little beaten egg white and dip into caster sugar to give the effect of a tree with snow on it.
To serve, cover cake with royal icing and decorate with Santa, a snowman and sugared rosemary trees.