Preheat your oven to 350°F (175°C).
Combine the drained sliced peaches, sugar, lemon juice, and cinnamon in a mixing bowl.
Whisk together the flour, sugar, baking powder, and salt in another bowl.
Add the milk and melted butter to the dry ingredients and stir until just combined.
Pour the peach mixture into the bottom of a greased 9x9 inch baking dish.
Spread the batter over the peaches, ensuring an even layer covers them completely.
Bake in the preheated oven for 30-35 minutes or until the topping is golden brown and set in the center.
Cool slightly before serving.