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 1/2 tsp 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!