Preheat the oven to 180ºC. Grease and line 2 baking trays.
In a large saucepan, melt butter with the golden syrup and raw sugar very gently over a low heat. Once the butter has melted, remove from the heat and set aside.
Dissolve the baking soda in water, add to the saucepan with the jar ingredients, and stir until thoroughly mixed.
Place tablespoonful’s of the mix onto a baking tray, allowing enough room between for them to spread. Flatten gently with a fork.
Bake 15 minutes or until golden.
When cool, spread one half of the biscuit with the white chocolate and sprinkle with toasted coconut.