Creating Old School Easy Brown Sugar Peach Cobbler is a straightforward process. Follow these steps:

1. Preheat Oven: Start by preheating your oven to 350°F (175°C).
2. Prepare Peaches: If using fresh peaches, peel and slice them into a large bowl. If using canned peaches, drain them well.
3. Mix Filling: Toss the sliced peaches with ½ cup of brown sugar until well coated. Set aside.
4. Combine Dry Ingredients: In a separate bowl, mix the flour, remaining brown sugar, baking powder, and salt together.
5. Add Wet Ingredients: Pour the melted butter, milk, and vanilla extract into the dry ingredients. Stir until just combined; the batter will be lumpy, which is okay.
6. Incorporate Peaches: Gently fold the peaches into the batter until evenly distributed.
7. Prepare Baking Dish: Grease a 9×13-inch baking dish with butter or non-stick spray. Pour the batter and peach mixture evenly into the dish.
8. Sprinkle Cinnamon: If desired, sprinkle a little ground cinnamon over the top for added flavor.
9. Bake: Place the dish in the preheated oven. Bake for 30-35 minutes, or until the top is golden brown and a toothpick inserted in the center comes out clean.
10. Cool Slightly: Once baked, remove from the oven and allow it to cool for about 10 minutes before serving.