These are wonderful cake like dessert bars rolled in powdered sugar.
1 Preheat oven to 250 degrees F (120 degrees C). Grease one 9×13 inch baking dish.
2 In a saucepan over medium heat, melt the butter and blend together with the brown sugar. Remove from heat; set aside to cool.
3 Add the flour, baking powder, vanilla and chopped nuts.
4 Pour into prepared pan and bake at 250 degrees F (120 degrees C) for 50 minutes. Remove from oven and allow to cool. Cut into bars and roll in confectioners’ sugar.