Tonka beans will blow your mind. As a long time fan of vanilla (So much so, if I was on Saturday Kitchen it would be my heaven ingredient), I would go as far to say tonka bean is like vanilla but better. Yes, better than vanilla! It has a similar natural sweetness but it also has more depth of flavour, almost a tobacco/smokeyness to it. A very interesting taste that marries perfectly to baking. I would say its an easy substitute for vanilla in most recipes. Tonka beans are really easy to get hold of online and not that expensive, they have a long shelf life and come looking like big black seeds which need finely grating before adding to your bake. In this recipe I have married them with coconut which taste really exotic and different, really unique.