Preheat your oven to 350°F (175°C).
In a mixing bowl, combine the blueberries, sugar, lemon juice, and cinnamon.
Transfer the blueberry mixture to a greased baking dish.
In another bowl, whisk together flour, baking powder, and salt.
Add milk and melted butter to the dry ingredients, mixing until combined.
Pour the batter over the blueberry mixture in the baking dish.
Bake in the preheated oven for 40-45 minutes, until golden brown.
Let it cool for a few minutes before serving.
Serve warm, ideally with a scoop of vanilla ice cream.
Enjoy your homemade blueberry cobbler!