COOKIES: Cookies: Heat oven to 350 degrees. Grease cookie sheets. In large bowl, beat brown sugar and 1/2 cup butter until light and fluffy. Add 1 tsp. vanilla, chocolate and egg; blend well. Lightly spoon flour into measuring cup; level off. In small bowl, combine flour, baking soda and salt. Add dry ingredients and sour cream to chocolate mixture; mix well. Stir in walnuts. Drop by heaping teaspoonfuls 2" apart on greased cookie sheets. Bake at 350 for 10 to 14 minutes or until set. Cool 1 minute; remove from cookie sheets. Cool completely. Frosting: In a small bowl, combine all frosting ingredients, adding enough milk for desired spreading consistency; blend until smooth. Spread on cooled cookies. Allow frosting to set before storing. Makes: 3 dozen Posted by: Debbie Carlson (D.CARLSON GEnie)