Preheat oven to 170 degrees celsius (fan-forced).
Cream butter and sugar on high speed in a stand mixer.
Add egg yolk and beat into mixture.
Add sifted flour and cinnamon, and salt and fold to combine.
Warm honey so that it's runny (10-20 seconds in the microwave should work well) and add to mixture.
Beat again until well combined.
Place mixture into fridge for 10-15 minutes (or until it's just firm enough to roll into balls).
Mix together additional sugar and cinnamon.
Roll mixture into walnut-sized balls (about 3cm in diameter) and coat in sugar and cinnamon mixture.
Space balls of mixture apart on a baking tray lined with baking paper. Remember to leave enough room for the biscuits to spread.
Place trays in oven and bake for 15 minutes or until a light golden colour.