Preheat your oven to 425°F (220°C) and prepare your baking pan by greasing it lightly.

In a large mixing bowl, combine sliced fresh peaches with white sugar, brown sugar, ground cinnamon, nutmeg, lemon juice, and cornstarch. Toss gently to coat.

Transfer the peach filling into the greased baking pan and bake for 10 minutes.

While the peaches bake, whisk together flour, baking powder, salt, and sugar in a medium bowl. Cut in cold butter until resembling coarse meal.

Gradually stir in boiling water until just combined; do not overwork the dough.

After the peach filling has baked, drop dollops of the topping over it.

Mix additional sugar and ground cinnamon in a small bowl, then sprinkle over the cobbler topping.

Bake for an additional 30 minutes until the topping is golden brown and bubbly.

Let cool briefly and serve warm, ideally with vanilla ice cream or whipped cream.