Instructions: Preheat oven to 325. With an electric mixer, beat together sugar, egg, liqueur and melted margarine until blended. Combine cake flour, cocoa, baking powder and salt. Add to the sugar mixture, beating just to blend. Stir in walnuts. Spray 9" square pan with cooking spray, pour batter into pan and bake 30 minutes, until toothpick in center comes out clean. Cool before cutting.

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