1Heat oven to 350°F. Spray 13x9-inch pan with cooking spray.
2Spread pumpkin pie mix in pan. Sprinkle dry cake mix over pumpkin. Sprinkle butter and pecans over cake mix.
3Swirl knife through mixture. Turn pan one-fourth turn and repeat.
4Bake 50 to 60 minutes or until lightly browned and top is set.