Preheat your oven to 350°F (175°C).
Wash and core the apples, creating a hollow center.
In a bowl, mix brown sugar and cinnamon.
Stuff the hollowed apples with the sugar-cinnamon mixture.
Add walnuts and raisins into the mixture if desired.
Place the apples in a baking dish.
Dot the tops with butter.
Pour water around the apples in the dish.
Bake in the preheated oven for 25-30 minutes until tender.
Let cool slightly before serving.