Preheat oven to 190 degrees Celsius
Mix all the base ingredients together and bake for 10 minutes in 13x9" baking dish.
Mix together the topping ingredients until just combined into a batter.
Dollop the batter onto the peach base until dish is completely covered.
Bake for another 30-45 min. or until golden brown.
(Optional) Sprinkle with more cinnamon.