Preheat your oven to 375°F (190°C).
Place the melted butter in a 9x13 baking dish and swirl to coat the bottom.
Prepare the peach filling:
In a saucepan over medium heat, combine sliced peaches, both sugars, cinnamon, lemon juice, and cornstarch. Cook for 5–7 minutes until bubbly and slightly thickened. Remove from heat.
Make the batter:
In a mixing bowl, whisk together flour, sugar, baking powder, and salt. Add the milk and stir until just combined.
Assemble the cobbler:
Pour the batter evenly over the melted butter in the baking dish—don’t stir! Spoon the warm peach mixture evenly over the batter. Again, don’t stir—it will bake up beautifully.
Bake for 40–45 minutes or until golden brown and the batter has risen to the top.
Cool slightly before serving. Serve warm with vanilla ice cream or whipped cream, if desired.
Optional Add-Ins:
A pinch of nutmeg for extra spice
A splash of vanilla in the batter
Use nectarines, plums, or a berry mix for variation