The nuts can easily be swapped for pecans, walnuts or whatever takes your fancy. And you can change the coffee to dried cranberries or orange/lemon zest. You can even make a desiccated coconut and lime zest version. When using coffee, try using a mixture of coffee beans ground up and instant coffee, and the cinnamon and aniseed could be any spice you like. (try cardamom).
When freezing, I use a small ice cream scoop so that each one is the same size, but you could roll the mixture into two logs and cut off each biscuit roughly 1cm thick.
