Add all the ingredients into a bowl, use your hands to mix all the ingredients very well.
Spoon this mixture into a rectangular/square cake pan that is lined with baking paper, press it down as firmly as possible. (this step is important – it will prevent the bars from falling apart)
Place in the freezer for at least 1 hour before slicing.
When sliced, wrap each bar in a grease-proof paper or cling film and place them in a zip-lock bag.
Enjoy!