Preheat oven to 375°F (190°C). Grease a baking dish.
Prepare Apples:
Peel, core, and optionally slice apples in half.
Prepare Pastry:
Roll out pie crusts and cut into squares large enough to wrap each apple.
Assemble Dumplings:
Place each apple in the center of a pastry square.
Sprinkle with sugar, cinnamon, nutmeg, and nuts if using.
Top each apple with small pieces of butter.
Fold pastry around the apple and seal the edges.
Prepare Glaze:
In a small saucepan, combine brown sugar, water, cinnamon, and vanilla. Bring to a boil, then reduce heat and simmer for 2–3 minutes.
Bake Dumplings:
Place dumplings in the prepared baking dish. Pour glaze over the top.
Bake for 35–40 minutes, or until pastry is golden and apples are tender.
Serve:
Let cool slightly, then serve warm with ice cream or whipped cream.
Serving and Storage Tips
