Preheat oven to 350°F.
Lightly grease a 9 x 13“ baking dish.
Mix together all the ingredients for the fruit filling into a medium saucepan.
Give them a simmer, while stirring occasionally, for about 10 mins or so.
Remove from heat & set aside.
Whisk the melted butter and sugar together in a medium bowl.
Add the buttermilk, flour, vanilla, baking powder, and salt.
Whisk until combined & mostly smooth.
Dump the fruit mixture into the greased baking dish.
Top with the cobbler mixture & sprinkle with cinnamon sugar.
Bake on the center rack for 45-60 mins or until the topping is golden and the fruit filling is bubbling around the edges.
Remove from the oven and let it cool for 5 mins before serving.
