Chocolate Wafer Slice
["1/2 cup margarine, melted", "1/2 cup sugar", "1 egg", "3 Tbsp. cocoa", "1 tsp. vanilla", "1/2 cup chopped walnuts", "1/2 package graham wafers, rolled"]
["In large saucepan, melt margarine. Add sugar, egg and cocoa; boil for one minute. Remove from heat. Add vanilla, walnuts and graham crumbs. Mix well. Press into greased 9x11 inch pan. Chill. Frost with butter icing when cooled."]
["margarine", "sugar", "egg", "cocoa", "vanilla", "walnuts", "graham wafers"]