Beat the butter and blue cheese until creamy. It will look quite
ghoulish and green at this stage, don’t panic.
In a separate bowl, combine the flours, pepper and walnuts.
the dry ingredients into the cheese and butter mixture, using your
hands if you need to work it into a dough.
Divide in half and roll into two logs approx 20 cm in length. Wrap
in cling film and refrigerate until firm.
Preheat the oven to 170deg C.