In a mixing bowl add melted coconut oil, peanut butter, tahini, maple syrup and vanilla extract. Whisk to combine well.
Crush rice cakes to small pieces and add to wet mixture. Mix well to ensure all rice cake pieces are covered well.
Spoon mixture into a lined slice tin. Use the back of a spoon or spatula to press mixture firmly into shape to ensure they hold together when cut.
Melt dark chocolate and drizzle over bars.
Transfer to fridge for 6 hours + or 2 hours in the freezer to set.
Once firmly set, use a sharp knife to cut into shapes.
Store in sealed containers to keep fresh. I use a FoodSaver System to vacuum seal to keep freshest, longer. Keep in fridge or freezer. Must be kept chilled.