Peach Cobbler

8–9 medium peaches, peeled and cut into 2 inch chunks (about 10 cups)
1/4 cup packed light or dark brown sugar
1 Tablespoon cornstarch
1 Tablespoon lemon juice
1/2 teaspoon pure vanilla extract
1/2 teaspoon ground cinnamon
1/8 teaspoon ground nutmeg
1/8 teaspoon salt

Buttermilk Biscuit Topping

2 cups all-purpose flour (spoon & leveled)
1/2 cup granulated sugar
1 and 1/2 teaspoons baking powder
1/4 teaspoon baking soda
1/2 teaspoon salt
1/2 cup unsalted butter, cold and cubed
1/2 cup buttermilk, cold
egg wash: 1 large egg beaten with 1 Tablespoon milk or buttermilk
optional: 2 Tablespoons granulated sugar mixed with 1/2 teaspoon ground cinnamon

Preheat the oven to 350°F (177°C) and grease a 9×13 inch pan.

Make the filling: In a large bowl, stir the peach chunks, brown sugar, cornstarch, lemon juice, vanilla, cinnamon, nutmeg, and salt together until thoroughly combined. Spoon filling into prepared pan and bake for 10 minutes. Remove from the oven and set aside as you prepare the topping. Keep oven on.

Make the topping: Whisk the flour, sugar, baking powder, baking soda, and salt together in a large bowl. Add the butter. Using a pastry cutter or two forks, cut the butter into the mixture until it resembles coarse meal (pea-sized bits). A pastry cutter makes this step very easy and quick! While slowly stirring, slowly drizzle in the buttermilk. Mix until evenly combined. Take handfuls of dough and gently flatten out. Place dough all over the top of the peach filling. It doesn’t need to be perfect or look pretty– some peach filling can be showing.

Brush the top of the biscuit dough with egg wash, then sprinkle with cinnamon-sugar if using.

Bake for 40-45 minutes, or until lightly browned and biscuit topping is cooked through. (Stick a toothpick into the biscuit topping, if it comes out clean– it is cooked through and the cobbler is done.) Set the pan on a wire rack, then cool for 5 minutes before serving. Serve warm with vanilla ice cream or whipped cream.

(Source: https://sallysbakingaddiction.com/fresh-peach-cobbler/#tasty-recipes-70071)