Categories: Cakes, Desserts 
      Yield: 10 servings 
  
      1 c  Graham Cracker Crumbs 
      3 tb Sugar 
      3 tb Margarine, Melted 
     24 oz Cream Cheese, Softened 
    3/4 c  Sugar 
      1 ts Vanilla 
      3    Large Eggs 
      1 oz Square Unsweeted Chocolate * 
  
  *  The 1 oz square of unsweetened Chocolate should be melted. 
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  Combine crumbs, sugar, and margarine; press onto bottom of 9-inch Spring- 
  form cake pan.  Bake at 350 degrees F., 10 minutes. Combine cream cheese, 
  sugar and vanilla, beating at medium speed on electric mixer until well 
  blended.  Add eggs, one at a time, mixing well after each addition. Blend 
  chocolate into 1 cup batter.  Spoon plain and chocolate batters alternately 
  over crust; cutting through batters with knife several times for the marble 
  effect.  Bake at 450 degrees F., 10 minutes. Reduce oven temperature to 250 
  degrees F.; continue baking 30 additional minutes. Loosen cake from rim of 
  pan; cool before removing rim of pan. Chill.