------------------------------------BASE------------------------------------
      1 c  Chocolate wafer crumbs

    1/4 t  Cinnamon

      3 T  Margarine, melted

------------------------------------BODY------------------------------------
      4 pk 8-ounce cream cheese, soften

    3/4 c  Sugar

      4 ea Eggs

    1/2 c  Sour cream

      1 t  Vanilla

    1/2 c  Semi-sweet chocolate pieces,

      2 T  Orange flavored liqueur

    1/2 t  Grated orange peel

   BASE: Combine crumbs, cinnamon and margarine; press onto bottom of
  9-inch springform pan.  Bake at 325, 10 minutes.

   BODY: Combine cream cheese and sugar, mixing at medium speed on
  electric mixer until well blended.  Add eggs, one at a time, mixing
  well after each addition.  Blend in sour cream and vanilla.  Blend
  chocolate into 3 cups batter; blend liqueur and peel into remaining
  batter.  Pour chocolate batter over crust. Bake at 350, 30 minutes.
   Reduce oven temperature to 325.  Spoon remaining batter over
  chocolate layer; continue baking 30 minutes.  Loosen cake from rim of
  pan; cool before removing rim of pan.  Chill.  Garnish with chocolate
  curls, if desired.