Double Chocolate Cookies
["1 c. (2 sticks) butter, softened", "1 1/2 c. sugar", "2 eggs", "2 tsp. vanilla", "2 c. plain flour", "2/3 c. Hershey's cocoa powder", "3/4 tsp. baking soda", "1/4 tsp. salt", "2 c. (12 oz.) chocolate chip morsels", "1/2 c. chopped nuts (optional)"]
["Heat oven to 350\u00b0.", "In large bowl, beat butter, sugar, eggs and vanilla until light and fluffy.", "Stir together flour, cocoa, baking soda and salt; add to butter mixture.", "Stir in chocolate morsels and nuts.", "Drop by rounded teaspoonfuls onto ungreased cookie sheet.", "Bake 8 to 10 minutes or just until set.", "Cool slightly and remove from cookie sheet to wire rack.", "Cool completely.", "Makes 4 1/2 dozen."]
["butter", "sugar", "eggs", "vanilla", "flour", "cocoa", "baking soda", "salt", "chocolate chip", "nuts"]