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["In", "a", "heavy", "medium", "size", "saucepan, heat 1 cup of the chocolate chips, unsweetened chocolate and margarine or butter until", "melted, stirring constantly.", "Transfer to a large mixer bowl to cool slightly.", "Stir together flour, baking powder and salt.", "Add eggs,", "sugar", "and vanilla to the chocolate mixture and beat", "well.", "Add flour mixture and beat until well mixed. Stir in remaining chocolate chips and nuts.", "Drop by heaping teaspoonful", "on lightly greased sheets.", "Bake at 350u00b0 for 8 to 10 minutes.", "(Edges are firm and surface is dull and cracked.) Cool on sheet for 1 minute."]