Prepare peaches by washing fuzz, peeling skin and cutting into chunks.
Add to a sauce pan and turn heat to medium high.
Add brown sugar and cinnamon and allow to come to a boil.
Using a potato masher, mash all the peaches into uniform chunks.
Reduce to a simmer. In another bowl combine corn starch and water and pour into sauce pan. Allow to thicken slightly, remove from heat and store in mason jar.