1/2 lb. butter
4 sq. unsweetened chocolate
2 c. sugar
4 eggs, slightly beaten
2 tsp. vanilla
1 c. sifted flour
(For Passover substitute 3/4 c. potato starch; 1/4 c. Matzah cake flour)
Walnuts (optional)

Melt butter in top of double boiler or Number 2 (low) in microwave; cool. Add sugar; mix. Add eggs and vanilla; mix. Add flour; mix. Pour into 2 lightly greased 8 inch square pans or 1 lightly greased 9 x 13 inch pan. Sprinkle nuts on top if you wish. Bake at 350 degrees approximately 20 minutes. Cool before cutting and removing. Passover brownies will be very moist and fudgy.