Peanut Butter Crunch Cake
["1 pkg. SuperMoist 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 (6 oz.) pkg. semi-sweet chocolate chips"]
["Beat cake mix, brown sugar and peanut butter in bowl until crumbly. Reserve 2/3 cup.", "Beat remaining mixture, water, oil and eggs.", "Pour into pan.", "Stir nuts into reserved crumbly mixture. Sprinkle over batter. Sprinkle with chocolate chips.", "Bake at 350\u00b0 for 40 to 45 minutes in a 13 x 9-inch pan."]
["brown sugar", "peanut butter", "water", "vegetable oil", "eggs", "nuts", "semi-sweet chocolate chips"]