Weight Watchers Double Chocolate Brownies

2 eggs
1/4 cup sugar
2 tablespoons coffee liqueur
6 tablespoons cake flour
2 tablespoons sifted unsweetened cocoa powder
1/4 teaspoon baking soda
1/4 teaspoon salt
1/4 teaspoon baking powder
1 ounce semisweet chocolate
1 ounce chopped walnuts

Preheat oven to 350ºF. Spray an 8 x 8 x 2 cake pan with nonstick spray and set aside. In a medium mixing bowl, using an electric mixer on high speed, beat eggs until custard-like consistency, about 4 minutes, until doubled in volume. Slowly add sugar, 1 tablespoon at a time, beating well after each addition. Stir in liqueur.

In a small bowl, combine remaining ingredients except chocolate chips. Add to egg mixture, stirring and folding just until combined. Pour into cake pan and bake for 20 minutes, or until a toothpick comes out clean from the center. Remove to wire rack and cool in the pan. In a small heat-proof measuring cup, combine the chocolate chips and 1 tablespoon of water and melt over low heat stirring constantly until smooth, about 30 seconds. Spread over cake with spatula. While chocolate is still warm, sprinkle cake with walnuts.

Cut into 16 equal squares.