Instructions: Preheat the oven to 350 degrees. Butter and flour a 9- by 9-inch baking pan.

Sift together the all-purpose flour, cake flour, baking powder, and salt.

Whisk the butter and chocolate in a bowl; beat in the sugar, eggs, and vanilla extract. Add the dry ingredients and stir to form a batter. Stir in the 3/4 cup chopped nuts of your choice.

Pour and scrape the batter into the prepared pan; spread the batter evenly. Sprinkle the remaining chopped nuts evenly over the top if desired. Bake the brownies for 30 to 33 minutes, or until just set.

Cool the brownies completely in the pan on a rack. Cut into 2 1/4- by 2 1/4-inch squares. Remove the brownies from the pan using a metal spatula. Store in an airtight tin.

This recipe yields sixteen 2 1/4- by 2 1/4-inch brownies.

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