Weet-Bix slice ingredients are 150g tararua butter ,melted .4 weet -bix (crushed).
½ cup Chelsea White Sugar .1 cup Edmonds Standard Grade Flour.1 Tbsp cocoa powder.
1 tsp Edmonds Baking Powder..1 drop vanilla essence.1 ½ cups Chelsea Icing Sugar.
½ cup dessicated coconut..1 tsp cocoa powder...25g Tararua Butter..Hot water to mix.
Here is some photo .