2 c  Walnut Halves (about 8 oz)

      3 oz Unsweetened chocolate

      5 tb Unsalted butter plus

      1 ts Unsalted butter

      2 c  Flour

      2 ts Baking powder

      3    Eggs

      1 c  Sugar

      1 ts Grated orange zest

  Preheat oven to 350 degrees.  Place the walnuts on a cookie sheet and
  toast until golden brown, about 10 minutes.  Let cool and then chop
  coarsely. In a double boiler over simmering water, melt the chocolate
  and butter together.  Remove from the heat and stir until smooth. Let
  cool for 10 minutes.
  Sift together the flour and baking powder.  In a large bowl, beat the
  eggs lightly.  Gradually beat in the sugar.  Add the orange zest.
  Stir in the cooled chocolate until blended.  Stir in the flour and
  baking powder until incorporated.  Fold in the chopped walnuts.
  Divide the dough in half, wrap in plastic wrap and refrigerate at
  least 1 hour or overnight.
  Butter a large cookie sheet and preheat the oven to 350 degrees.
  Shape each half of the dough into a 14 x 2-1/2-inch log.  Place about
  4 inches apart on the prepared pan.  Smooth the tops and sides with a

  rubber spatula. Bake for 40-45 minutes, or until the logs are firm
  when pressed in the center. Remove the baking sheet from the oven. Do
  not turn off the oven.
  Slide the logs onto a cutting board.  With a large knife, cut each log
  diagonally into 1/2-inch slices.  Stand the slices upright on edge on
  the prepared cookie sheet.  Return to the oven and bake for 15
  minutes longer, or until crisp.  Transfer to wire racks to cool
  completely.