Corn flour's biscuits
Let the raisin soften in a bowl of warm water for half an hour and let the butter melt.
Blend corn flour with “00” flour, sugar and salt. Then add butter, the egg yolk, orange zest and in the end the rum; knead the dough until it will be uniform.
With a spoon, take little quantities of the dough and form into balls which you flatten and lay them down on the baking tray.
Bake in preheated oven to 160°C for 15/20 minutes or so.