1 c. butter
4 envelopes or 4 oz. choco-bake unsweetened chocolate
4 eggs
2 tsp. vanilla
2 1/2 c. sugar
1 3/4 c. flour
1/2 tsp. salt
Walnuts (optional)

Preheat oven to 350 degrees. In small saucepan, melt butter; remove from heat. Stir in chocolate. Cool to room temperature.

In small bowl, beat eggs and vanilla. Gradually add sugar, beating until pale yellow. Blend in choco-bake mixture. Gradually add flour and salt. Stir in nuts. Spread in greased and floured 9x13 inch pan. Bake for 25-30 minutes or until toothpick comes out clean.