The great thing about brownies is that you probably have the ingredients already.
From a box sold in Canby, Oregon.
Brownies
5 Tbsp. chocolate
1/4 c. butter
1 c. sugar
2 eggs
1/2 c. flour
1/8 tsp. salt
1 tsp. vanilla
1 c. nuts
Melt chocolate and butter together. Add sugar and mix well. Add beaten eggs. Add 1/2 c. sifted flour. Add vanilla and nuts. Bake 325, 8″ [square] pan, 35 minutes. Mark while warm.