Hersheys Cocoa Brownies

Preheat oven to 175 C. Sift the cocoa, flour, baking powder, and salt together into a small bowl. In a medium-sized bowl, beat the sugar and eggs together until the mixture is light and thick. Carefully fold in the butter and vanilla. Then add the dry ingredients. Stir in the nuts, and pour batter into a greased 9 x 13 pan. Bake for 30-35 minutes, until a toothpick inserted into the center comes out with moist crumbs attached.