Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
   1      cup           Water
     1/2  cup           Margarine or butter
   1      cup           All-purpose flour*
   4                    Eggs
                        -----CREAM FILLING-----
     1/3  cup           Sugar
   2      tablespoons   Cornstarch
     1/8  teaspoon      Salt
   2      cups          Milk
   2                    Egg yolks -- slightly beaten
   2      tablespoons   Margarine or butter
                        Softened
   2      teaspoons     Vanilla
                        -----CHOCOLATE FROSTING-----
   1                    Ounce unsweetened chocolate
   1      teaspoon      Margarine or butter
   1      cup           Powdered sugar
   2      tablespoons   Hot water

Preparation:

Heat oven to 400 degrees. Heat water and margarine to rolling boil in 2-1/2-quart saucepan. Stir in flour; reduce heat. Stir vigorously over low heat about 1 minute or until mixture forms a ball; remove from heat. Beat in eggs, all at once; continue beating until smooth. Drop dough by scant 1/4 cupfuls onto ungreased cookie sheet. Shape each into finger 4-1/2 inches long and 1-1/2 inches wide with spatula. Bake 35 to 40 minutes or until puffed and golden brown. Cool away from draft. Cut off top one-third of each eclair and pull out any filaments of soft dough. Fill eclairs with Cream Filling. Replace tops and frost with Chocolate Frosting. Refrigerate until serving time. Refrigerate any remaining puffs. CREAM FILLINGMix sugar, cornstarch and salt in 2-quart saucepan. Gradually stir in milk. Cook over medium heat, stirring constantly, until mixture thickens and boils. Boil and stir 1 minute. Gradually stir at least half of the hot mixture into egg yolks. Stir into hot mixture in saucepan. Boil and stir 1 minute; remove from heat. Stir in margarine and vanilla; cool.CHOCOLATE FROSTINGHeat chocolate and margarine in 1-quart saucepan over low heat until melted; remove from heat. Stir in powdered sugar and hot water. Beat until smooth and of spreading consistency.