Line a 9 inch square pan with buttered foil, extending foil over edges of pan for easy removal of squares.

Whisk together:

2 cups flour
1 tsp. baking powder
1/2 tsp. salt
1/4 tsp. soda

In mixer, beat together:

2 cups brown sugar
3/4 cups butter, unsalted

Add:

2 eggs, one at a time
2 tsp. vanilla
3 cups chopped pecans
1/2 pint fresh raspberries