Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
  8             ounces  semisweet chocolate -- chopped
  1                cup  plus 2 tablespoons powdered sugar
     3/4           cup  unsalted butter (1 1/2 sticks) -- cut into small
                        pieces
  5                     eggs -- separated
     3/4           cup  unsweetened cocoa powder
  1               Dash  salt
  1               Dash  cream of tartar
     3/4           cup  heavy whipping cream

Preparation:

Melt chocolate in bowl set over simmering water. Add sugar and mix well. Stir in butter 1 piece at a time and blend well. Remove bowl from over water and add egg yolks 1 at a time, mixing well after each addition. Beat in cocoa. Let cool 5 minutes, stirring often. Beat egg whites with salt and cream of tartar until stiff peaks form. Gently stir 1/3 of whites into chocolate mixture, then fold remaining whites into chocolate mixture; DO NOT BEAT. Whip heavy cream to soft peaks still pourable. Carefully fold cream into chocolate mixture until well blended. pour into 9x5-inch glass loaf pan or 1 1/2-quart mold; DO NOT USE METAL. Chill at least 10 hour or overnight. Just before serving, moisten a towel with hot water. Wrap towel around pan or mold and invert onto platter. Slice marquise into serving portions.

Nutritional Information:

2174 Calories (kcal); 164g Total Fat; (60% calories from fat); 53g Protein; 187g Carbohydrate; 1180mg Cholesterol; 649mg Sodium