Preheat oven to 375*. Very lightly butter or spray the bottom of a 9x13 baking dish.
Aftering opening cans of peaches, drain two of the cans of liquid. Then spread all three cans of peaches and remaining liquid in bottom of your 9x13 baking dish.
Sprinkle the peaches with cinnamon.
Spread the dry cake mix evenly over the top of your cinnamon peaches, followed by the brown sugar spread over the top, as well.
Arrange the thinly sliced butter over the top of the cake, making sure to cover all surface and corners of the mixture. Top with the chopped pecans
Bake at 375* for approx one hour until cake is golden brown on top. You may want to cover loosely with foil towards end of baking time, if pecans are getting too dark.
After cake has finished cooking, remove from oven. Serve warm or cold, with ice cream or whipped cream. ENJOY!
