3 c.packed brown sugar
1 c.butter
3 eggs
1 tbsp. vanilla
1 1/2 c. flour
1 1/2 c. whole wheat flour
1 1/2 tsp. baking powder
1 1/2 tsp. baking soda
1 1/2 c. nuts - any kind you like

 
1.  Preheat oven to 350 degrees.  Grease a 9X13 baking pan (or line with parchment paper, which I did) 

2.  In medium saucepan, heat brown sugar and butter over medium heat until butter melts and mixture is smooth, stirring constantly.  Cool slightly.

3.  Stir in eggs, one at a time, then add vanilla.

4.  Stir in flours, baking powder and baking soda.

5.  Spread batter in prepared baking pan, sprinkle with nuts.

6.  Bake 25 - 30 minutes or until an inserted toothpick comes out clean.  Cool a bit in pan on wire rack, then cut into bars while still warm.