Preheat the oven to 350°F (175°C).

In a mixing bowl, combine the sliced strawberries, 1/2 cup of sugar, cornstarch, and vanilla extract. Toss to coat the strawberries evenly.

Pour the strawberry mixture into a greased baking dish.

In another bowl, whisk together the flour, remaining sugar, baking powder, and salt.

Stir in the milk and melted butter until just combined.

Pour the batter over the strawberries in the baking dish, spreading it evenly.

Bake in the preheated oven for 30-35 minutes, or until the topping is golden brown and a toothpick inserted comes out clean.

Let cool for a few minutes before serving.