Preheat oven to 180°C/350°F (160°C fan forced).
Line two baking trays with baking paper.
Mix dry: Mix flour, oats, coconut and sugar in a bowl.
Melt butter and golden syrup: Place butter and golden syrup in a saucepan over medium high heat and stir until butter has melted.
Baking soda: Add baking soda and stir to combine – it will fizz up, this is normal. Immediately remove from heat.
Biscuit dough – Pour butter mixture into flour and mix until just combined. The mixture will be crumbly but should stick when you press together.
Form patties – Scrunch / press 1 tablespoon of the mixture into balls, then flatten into patties. (Thinner = crisper, thicker = chewier centre, crispy edges) Place balls, 2.5 cm/1" apart, on prepared trays.
Bake for 15 minutes, swapping trays halfway during cooking, or until deep golden. (Bake 12 min for chewy biscuits!)
Cool to crisp – Stand on trays for 5 minutes. Transfer to a wire rack to cool – they harden as they cool!