Instructions:
- Preheat the Oven: Preheat your oven to 350°F (175°C). Grease a 9×13-inch baking dish.
- Mix Dry Ingredients: In a medium bowl, whisk together the sugar, flour, baking powder, and salt until well combined.
- Add Wet Ingredients: Gradually stir in the milk and melted butter until the mixture is smooth. Fold in the lemon juice, lemon zest, and vanilla extract (if using) until combined.
- Pour into Baking Dish: Pour the batter into the prepared baking dish. Do not stir; the batter will be thin.
- Add Lemon Filling: In a separate bowl, combine 1 cup of granulated sugar with 1 cup of lemon juice. Pour this lemon mixture over the batter in the baking dish. Again, do not stir.
- Bake: Bake in the preheated oven for 40 to 45 minutes, or until the top is golden and set.
- Cool and Serve: Allow the cobbler to cool slightly before serving. It can be served warm or at room temperature, topped with whipped cream or vanilla ice cream if desired.