Drain 2 of the 3 cans of peaches (leaving just 1 can undrained). Empty peaches evenly into the bottom of a 9x13 baking dish.
Sprinkle peaches evenly with cinnamon.
Cover the peaches with the dry cake mix and use the back of a fork to gently press the cake mix down evenly.
Sprinkle brown sugar evenly over cake mix.
Arrange the thinly sliced butter squares evenly over the dump cake.
Sprinkle on chopped pecans.
Bake at 375 degrees F. for one hour, until golden brown. If pecans begin to get too dark, loosely cover baking dish with aluminum foil and finish baking.
Notes
This easy peach dump cake recipe is perfect for a crowd! Top each dump cake serving with vanilla bean ice cream or whipped cream!
You can substitute in white cake mix for the yellow, if preferred.