Fresh peaches are at their best in late summer, but you don't need fresh peaches for a great peach cobbler. This recipe uses canned peaches so you can enjoy this treat any time of year! Plus, many people think of "cobblers" as dumpling-style desserts. But where I'm from in Louisiana, the best peach cobblers are made with a double pie crust (and therefore a high crust-to-peach ratio!). For a shortcut, swap the homemade crust for 2 rounds of boxed pie dough.
Roll two-thirds of the pie dough into a 12-inch square on a lightly floured surface. Fit the dough into the corners and up the sides of an 8-inch square baking pan and refrigerate. Roll the remaining dough into a 9-inch square on a lightly floured surface. Place the square of dough on a baking sheet and refrigerate 1 hour while you prepare the filling.
Drain the peach slices and put in a large bowl with the brown sugar, cornstarch, nutmeg, salt, lemon juice, brandy and vanilla. Mix well.
Remove the dough-lined pan from the refrigerator and sprinkle the bottom with 1 tablespoon of the granulated sugar and the flour in an even layer. Add the peaches and any accumulated juices. Put the butter pieces on top.
Remove the dough square from the refrigerator and place it on top, pinching the edges together and folding under to seal. Crimp as desired. Make a 2-inch X on the top crust with a sharp knife and cut 4 large slits around the center. Put the cobbler in the freezer while the oven preheats.
Preheat the oven to 400 degrees F. Beat the egg in a small bowl. When the oven is hot, remove the cobbler from the freezer and brush the top with egg wash and sprinkle with the remaining 2 teaspoons granulated sugar and the cinnamon.
Bake for 15 minutes, then lower the temperature to 350 degrees F and bake until the juices are bubbling and the crust is golden, about 35 minutes. Let cool before enjoying (the longer it cools, the more the filling will set). Serve with a scoop of ice cream, if desired.
Flaky Pie Dough:
Add the flour, sugar and salt to the bowl of a food processor. Pulse until the mixture is combined. (Alternatively, you can use a large bowl and a pastry blender.)
Add the butter and pulse until most of the butter is broken into pea-size pieces, about 15 pulses.
Add 6 tablespoons of the cold water to a small cup. Add the apple cider vinegar. Pour the liquid over the crumbly flour-butter mixture. Pulse until it looks like cottage cheese and there are no large pockets of flour. If necessary, pulse in up to 2 more tablespoons cold water.
Tip the mixture onto your work surface and gather the dough together. Divide the dough by shaping two-thirds of it into a square and wrapping tightly in plastic wrap. Shape the remaining one-third into a smaller square and wrap tightly in plastic. Let rest in the refrigerator for at least 1 hour and up to 3 days. It can also be frozen for up to 2 months. Makes one 8-inch square double crust.