Nanaimo bars - 2 (canadian)

--------------------------------BOTTOM LAYER--------------------------------
    1/2 c  butter
    1/4 c  Sugar, granulated
    1/3 c  Cocoa powder;unsweetened
      1    Egg;beaten
  1 3/4 c  Graham wafer cracker crumbs
    1/2 c  Nuts;finely chopped
      1 c  Coconut;shredded

--------------------------------MIDDLE LAYER--------------------------------
    1/2 c  butter
      3 tb Light cream
      2 tb Custard powder;*
      2 c  Icing Sugar

---------------------------------TOP LAYER---------------------------------
      4 oz Semisweet chocolate
      2 tb butter
 
  Bottom Layer: In double boiler, melt butter, sugar and cocoa; add egg
  and cook until thickened. Add crumbs, nuts and coconut. Press into
  ungreased 9 inch square pan.
  
  Middle Layer: Beat together butter, cream, custard powder and sugar;
  spread over base. Chill.
  
  Top Layer: Melt chocolate with butter; cool slightly. Pour over second
  layer; chill. Cut into bars.