1 cup butter or margarine
6 (1 ounce) squares unsweetened chocolate
2 cups sugar
1 tsp vanilla extract
1/2 tsp salt
1 cup flour
2 cups chopped walnuts (optional)
Preheat oven to 325°F.
In a saucepan over low heat, melt butter and chocolate; cool for 10 minutes. In a mixing bowl, beat eggs, sugar, vanilla and salt. Stir in the chocolate mixture. Add flour and nuts; mix well.
Pour into a greased 11-in. x 7-in. x 2-in. baking pan (cake pan). Bake at 325°F for 45-50 minutes or until a toothpick inserted near the center comes out with moist crumbs. Cool. Dust with powdered sugar.