| • | Preheat oven to 350 degrees F.
|
| • | Grease an 8x8 inch-baking pan.
|
| • | In a medium bowl, cream brown sugar and butter together until smooth.
|
| • | Beat in the vanilla and egg.
|
| • | Mix the baking powder, flour, walnuts and salt; stir into the sugar mixture.
|
| • | Smear onto the pan.
|
| • | Now, bake it for half an hour in the preheated oven.
|
| • | Chill it completely before frosting.
|
| • | Now combine all the ingredients of frosting except confectioner’s sugar in a small saucepan over low heat.
|
| • | Now, boil and simmer it for two minutes.
|
| • | After two minutes, cool and beat in the confectioners' sugar.
|
| • | Smear over cooled bars and cut it into squares. |