1 pkg. yellow cake mix
1/2 c. packed brown sugar
1 c. creamy peanut butter
1 c. water
1/4 c. vegetable oil
3 eggs
1/3 c. chopped nuts
1 pkg (6 oz.) semi-sweet chocolate chips

Heat oven to 350 degrees. Grease and flour rectangular pan, 13 x 9 x 2 inch.

Beat cake mix (dry), brown sugar and peanut butter in large bowl on low speed until crumbly. Reserve 2/3 cup of the crumbly mixture. Beat remaining crumbly mixture, the water, oil and eggs on low speed, scraping bowl constantly until moistened. Beat on medium speed 2 minutes. Pour batter into pan. Stir nuts into reserved crumbly mixture; sprinkle over batter. Sprinkle with chocolate chips. Bake until cake spring back when touched lightly in center, 40 to 45 minutes.