Double Chocolate Chunk Cookies
["4 sq. Baker's semi-sweet chocolate", "1/2 c. margarine, lightly softened", "1/2 c. granulated sugar", "1/4 c. firmly packed brown sugar", "1 egg", "1 tsp. vanilla", "1 c. all-purpose flour", "1/2 tsp. Calumet baking powder", "1/4 tsp. salt", "3/4 c. chopped walnuts (optional)", "4 sq. Baker's semi-sweet chocolate"]
["Melt 1 square chocolate in small microwavable bowl on High for 1 to 2 minutes or until almost melted, stirring after each minute. Stir until chocolate is completely melted.", "Cut 3 squares chocolate into large chunks; set aside."]
["chocolate", "margarine", "sugar", "brown sugar", "egg", "vanilla", "flour", "baking powder", "salt", "walnuts", "chocolate"]