Aunt Gwennie's Fudge Brownies

Delicious brownies from a beloved aunt:

1/2 cup butter
1 cup sugar
1 tsp. vanilla
2 eggs
2 1-oz. squares unsweetened chocolate, melted
1/2 cup sifted flour
1/2 cup chopped walnuts

Cream butter, sugar, and vanilla
Add eggs and beat well.
Blend in chocolate.
Stir in flour and nuts.
Bake in an 8"-square pan at 325 degrees for 30 to 35 minutes.