Makes 10-20 biscuits, depending on cookie cutter size.
Preheat the oven to 150°C. Cream together the butter and sugar, and then stir in the bran. Add the flour and knead until the dough holds together (the dough will be dry and crumbly to start with, but after a while the warmth of your hands will melt the butter). Roll out about five millimetres thick on a lightly floured surface and cut into the desired shapes. Bake for twenty minutes.