Preheat Your Oven: Set your oven to 375°F (190°C) and allow it to heat up while you prepare the ingredients.
Prepare the Peaches: If using fresh peaches, peel and slice them into thin wedges. If using canned peaches, drain them well. Place the peaches in a large mixing bowl.
Sweeten the Peaches: Add 1/2 cup of granulated sugar and 1/2 cup of brown sugar to the peaches.
Toss them gently to coat the peaches evenly. If you prefer, you can also add a teaspoon of cinnamon and a pinch of nutmeg for extra flavor. Let the peaches sit while you prepare the batter.
Make the Batter: In a separate mixing bowl, combine the flour, remaining 1/2 cup of granulated sugar, baking powder, and salt.
Whisk the dry ingredients together. Slowly add the melted butter, milk, and vanilla extract. Stir until the batter is smooth and well combined.
Assemble the Cobbler: Pour the batter into the 9x13-inch baking dish, spreading it evenly across the bottom.
Spoon the peach mixture evenly over the batter. The batter will rise around the peaches as it bakes, creating that delicious cobbler crust.
Bake the Cobbler: Place the baking dish in the preheated oven and bake for 40-45 minutes, or until the top is golden brown and a toothpick inserted into the crust comes out clean.
Cool and Serve: Remove the cobbler from the oven and let it cool for about 10 minutes before serving. Enjoy it warm with a scoop of vanilla ice cream or a dollop of whipped cream.