Preheat the oven to 350°F (175°C).

In a mixing bowl, combine the drained canned peaches, sugar, cornstarch, and cinnamon. Stir until well mixed.

Pour the peach mixture into the bottom of a greased 9x9 inch baking dish.

In another bowl, whisk together the flour, sugar, baking powder, and salt.

Add the milk and melted butter to the dry ingredients and mix until just combined.

Pour the batter over the peach filling in the baking dish, spreading it evenly.

Bake in the preheated oven for 30-35 minutes or until the topping is golden brown and a toothpick inserted comes out clean.

Let cool slightly before serving. Enjoy warm or at room temperature.