Preheat the oven to 375.
In a large pot, over medium heat, combine the strawberries, blueberries, raspberries, lemon juice and 1/2 cup sugar. Simmer for 5 minutes, stirring occasionally and delicately. Set aside.
In a mixing bowl add the flour, 1 cup sugar, baking powder and salt- whisk until combined. Add the milk and whisk just until it comes together- do not over whisk. Set aside.
In a separate bowl, melt the butter.
Time to assemble: Pour the melted butter into your baking pan . Pour the batter on top of the butter - DO NOT STIR! Carefully pour the berry mixture on top of the batter- DO NOT STIR!
Bake for 30-35 minutes until the batter has risen to the top and is golden brown and the berries are bubbling and are thick and syrupy.
Let the berry cobbler sit at room temp. for 30 minutes to cool before serving, this will also allow the berry mixture to thicken slightly.
Enjoy with some vanilla ice cream or whipped cream.