Preheat oven to 375 degrees F. Spray an 8x8 inch baking dish with non-stick spray then set aside.
In a medium size bowl, combine drained peaches and one cup sugar. Stir to combine. The mixture will create some liquid, this is normal.
In a large bowl combine Krusteaz Buttermilk Pancake Mix, cinnamon and milk. Stir to combine, but do not over mix. Some tiny lumps may remain, this is fine. Pour in melted butter and stir until butter is absorbed into the batter. Pour batter into prepared pan.
Top batter with peach mixture. Place in oven and bake for 50-60 minutes or until golden brown and crust on top appears set. Remove from oven and allow to cool slightly. Can be served warm, topped with ice cream, or at room temperature.