4 egg, beaten
1 c. butter
4 sq. chocolate, unsweetened
1 tsp. baking powder
2 c. sugar
2 tsp. vanilla
1 c. flour
1 to 1 1/2 c. walnuts or pecans

In sauce pan, melt chocolate and butter; let cool. Add rest of ingredients and stir until well blended. Pour into 9 x 13 inch pan. Bake 20 minutes at 350 degrees.