Instructions: Preheat oven to 350 degrees. Spray an 8-inch square cake pan with the cooking spray and dust lightly with flour.

In a medium bowl, sift the flour, cocoa and baking powder. In a bowl, combine the butter and sugar. Beat in the egg whites, egg, yogurt and vanilla. Gradually beat in the flour mixture until incorporated.

Pour the batter into the prepared pan and bake for 35 to 40 minutes or until a cake tester inserted in the center comes out clean. Let cool in the pan.

In a small bowl, melt the chocolate in the milk in the microwave or in a saucepan over barely simmering water. Let cool slightly. Invert the cake onto a platter and spread with the melted chocolate. Cut the cake into 9 squares and serve.

This recipe yields 9 servings.

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