Preheat oven to 350 degrees.

Grease a 8-inch square pan with baking spray or vegetable shortening.

In a medium bowl, sift…

  • 1 cup cocoa powder (sweet preferred)
  • 2/3 cup all-purpose flour
  • 1/4 teaspoon baking powder
  • 1/3 teaspoon salt

Using a stand-mixer, combine…

  • 2 eggs
  • 1/2 cup sugar
  • 1 teaspoon pure vanilla extract
  • 1/2 cup unsalted butter, melted

Gradually add the dry ingredients to the egg mixture.

Fold in…

  • 1/2 cup walnuts or pecans (coarsely chopped)
  • 1/2 cup semi-sweet or milk chocolate chips

Spread the batter evenly into the pan. Bake for 25 minutes. Place the pan on a wire rack to cool. Once completely cooled, cut into squares.