Wash the peaches well. Peel the skin if you prefer a smoother filling. Slice them into even pieces. Place them in a large bowl. Fresh peaches make the best flavor and texture for this homemade dessert.

Add sugar, brown sugar, lemon juice, vanilla, cinnamon, nutmeg, and cornstarch to the peaches. Mix gently until every slice is coated. Let the mixture rest for about ten minutes so the peaches release their natural juices.

Heat your oven to 350°F (175°C). Lightly grease a 9x13-inch baking dish with butter. Spread the peach filling evenly inside. Dot the top with one tablespoon of butter for extra richness.

In another bowl, combine flour, baking powder, salt, and sugar. Stir everything together until well mixed. This helps the topping bake evenly and gives it a soft, fluffy texture.

Pour melted butter, milk, and vanilla into the dry ingredients. Stir gently until just combined. Do not overmix the batter. A few small lumps are perfectly fine and help keep the topping tender.

Spoon the batter evenly over the peaches. Do not stir it into the fruit. As it bakes, the topping rises beautifully while the peaches become sweet and juicy underneath.

Bake for about 45 minutes. The topping should turn golden brown. The peach filling should bubble around the edges. If needed, bake for five more minutes until fully cooked.

Let the cobbler cool for at least 15 minutes before serving. This helps the filling thicken slightly. Enjoy warm with a scoop of vanilla ice cream for the perfect summer dessert.