1/2 c. butter
1 (1 oz.) square chocolate
1 c. sugar
1 c. flour
1/2 to 1 c. nuts
1 tsp. baking powder
1 tsp. vanilla
1 egg

FILLING:

1 (8 oz.) pkg. cream cheese, softened (reserve 2 oz. for frosting)
1/2 c. sugar
1/4 c. butter
2 tbsp. flour
1 egg
1/2 tsp. vanilla
1/4 c. nuts
1 (6 oz.) pkg. chocolate chips

FROSTING:

2 c. miniature marshmallows
1/4 c. butter
1 (1 oz.) square chocolate
2 oz. cream cheese
1/4 c. milk
3 c. powdered sugar
1 tsp. vanilla

Heat oven to 350 degrees. Grease and flour a 9 x 13-inch pan. In large saucepan, melt 1/2 cup butter and 1 square chocolate. Remove from heat and add the remaining bar ingredients. Mix well; spread in pan.

In small bowl, combine 6 ounces cream cheese with next 5 ingredients. Beat 1 minute. Spread over bar mixture. Sprinkle with chocolate chips. Bake at 350 degrees for 30 minutes. Remove from oven, sprinkle with marshmallows and bake 2 more minutes.

In a large saucepan, over low heat, melt 1/4 cup butter, 1 square chocolate, 2 ounces cream cheese and milk. Stir in powdered sugar and vanilla until smooth. Pour over marshmallows and swirl together. Cool; cut in bars. Store in refrigerator.