Spray your crockpot with nonstick spray
Add the contents of 1 entire can of sliced peaches into the crockpot. For the second can, discard the heavy syrup and add the peaches only.
Add the brown sugar, cornstarch, and cinnamon to the crockpot and mix well with the peaches.
Top with 1 box of yellow cake mix as evenly as possible. (DO NOT MIX)
Shake over a little more cinnamon on top of the cake mix.
Next, top the cake mix with slices of butter; try to cover evenly
Set the crock pot to high and let it go for 2.5 hours or until browned
Top with whipped cream, ice cream, or cool whip! DELICIOUS!