Grease a 23 cm square pan. Preheat oven to 180ºC . Sift flour, baking powder, and salt together. Melt butter and chocolate together over low heat. Beat eggs and sugar until light. Add flour mixture, chocolate mixture and quarter cup Kahlua. Blend well. Stir in nuts. Bake 30 minutes or until done. Cool in pan. Brush with remaining Kahlua. From Becky Witter Recipe By : Concord Hospital Admitting Cookbook Concord, NH