Blondie Brownies with Chocolate Chips

2-2/3 cups all-purpose flour
2-1/2 tsp. baking powder
1/2 tsp. salt
2/3 cup butter
2-1/2 cups packed brown sugar
3 eggs
1 cup chopped walnuts
1 cup semi-sweet chocolate chips

Preheat oven to 350*. Grease a 15 x 10 x 1 inch baking pan.

Sift flour, baking powder and salt together and set aside. Melt the butter and stir in the brown sugar. Cool for 10 minutes. Add the eggs one at a time, beating well after each addition.
Add the flour mixture, nuts and chocolate chips; blend well. Spread in the prepared pan. Bake 25-30 minutes or until done.