I purposely formulated this recipe to be slightly sweet, however you can sweeten it up if you prefer. You can add another tablespoon or two of maple syrup to the filling and swap the water in the biscuit topping for more maple syrup. If you've already baked your blackberry cobbler and want it sweeter, top it with some vanilla ice cream, a sprinkle of coconut sugar or drizzle some maple syrup on top.