In a 9x9 square baking dish, combine all the berry filling ingredients and stir until well mixed. Spread the berries evenly across the dish.
In a separate bowl, mix together all the cobbler topping ingredients until the dry ingredients are just moistened.
Using your hands, crumble the topping over the berries, gently pressing some pieces together to form small clumps.
Bake for 50-65 minutes, or until the berry filling is bubbling around the edges. The exact baking time may vary depending on the temperature of the berries.
Allow the cobbler to rest for about 10 minutes before serving. Enjoy warm, optionally with a scoop of vanilla ice cream.