1 c. water
1/2 c. butter, softened
1 1/2 sq. unsweetened chocolate
2 c. flour
2 c. sugar
2 eggs
1 tsp. baking soda
1/2 tsp. salt
1/2 c. nuts
1/2 c. sour cream

Frosting:

1 1/2 sq. unsweetened chocolate
1 tsp. vanilla
1/2 c. butter
6 tbsp. milk
4 1/2 c. powdered sugar

Combine water, chocolate and butter in a pan. Bring to a boil. Remove from heat and stir in flour and sugar. Add eggs, sour cream, soda and salt. Add nuts. Mix well. Pour into greased jelly roll pan, 15 1/2 x 10 1/2-inch.

Bake at 375°F for 20 to 25 minutes.

Combine frosting ingredients, except powdered sugar. Boil 1 minute. Add powdered sugar. Pour over bars while warm.