2 (3 oz.) pkgs. cream cheese
1 lb. powdered sugar
4 (1 oz.) sqs. unsweetened chocolate, melted
1/2 tsp. vanilla
1/2 c. chopped walnuts (optional)

Beat sugar and cream cheese. Add melted chocolate and other ingredients. Press in buttered 13 x 9 inch pan. Chill for 2 hours.