Categories: Chocolate, Cakes 
      Yield: 6 servings 
  
     10 oz Baker's semi-sweet chocolate 
           -(do not substitute) 
    1/2 c  Lightly salted butter 
      6 lg Eggs, separated, at room 
           -temperature 
      1 c  Granulated sugar 
      2    To 4 tsp creme de cacao, 
           -Kahlua or dark rum 
    1/2 ts Vanilla 
           Butter and powdered cocoa 
           -for the pan 
           Frosting: 
      1 c  Sour cream at room 
           -temperature 
     14 oz Baker's semi-sweet chocolate 
           -(do not substitute) 
  
  Cake: 
   
  Place oven rack in lower third of the oven, and preheat oven to 375 
  degrees.  Butter an 8 inch springform pan, and coat with powdered cocoa. 
   
  Melt chocolate and butter in a double boiler over hot, but *not boiling*, 
  water. (don't rush this step, chocolate burns easily) 
   
  Beat egg yolks in a lg mixer bowl at high speed, gradually adding 3/4 c of 
  the granulated sugar.  Beat until yolk mixture is pale yellow and thick, 4 
  to 6 minutes.  Add melted chocolate mixture to the yolk mixture. Beat until 
  completely smooth.  Add vanilla and liquor of your choice. Beat until 
  blended. 
   
  Beat egg whites in mdm mixer bowl at high speed until soft peaks form. 
  Gradually beat remaining 1/4 c granulated sugar into whites; continue 
  beating until stiff but not dry peaks form. Fold whites *gently* but 
  thoroughly into chocolate mixture.  Pour batter evenly into pan; smooth 
  top. 
   
  Bake 15 minutes.  Reduce oven to 350 degrees; bake another 15 minutes. 
  Reduce oven temp to 250; bake 30 minutes longer (total baking time is 1 
  hour).  Turn off oven; prop open oven door and allow cake to remain in oven 
  for 30 minutes.  Remove cake from oven and cover top with damp paper 
  towelling; let stand 5 minutes. 
   
  Remove towelling and cool cake completely.  Dome of cake will crack and 
  collapse; this is normal - press top of cake down lightly to smooth top. 
  Remove springform and transfer cake to serving platter. 
   
  To make the frosting: 
   
  Melt chocolate in double boiler over hot but not boiling water. Using a 
  wooden spoon, mix in sour cream.  Pour over the cake. Let cool and harden.