I had $2 off coupons for assorted berries I had bought, and due to an ice storm am stuck inside for several days. I have limited ways to use them and don't want them to go bad, so this cobbler was born, and we love our new arrival!
Preheat oven to 375 degrees. Spray a 9x13 inch glass baking dish with nonstick cooking spray.
In a medium bowl, toss berries with sugar and cornstarch. Mix in softened butter and Pour into prepared dish.
In a large bowl, whisk together the flour, sugar, baking powder and salt. Cut in the butter with a fork or your fingers, until coarse crumbs form. Add buttermilk and mix gently, just until combined.
Drop topping onto berries to cover and sprinkle with sugar. Place baking dish on a baking sheet in case of spillover. Bake 45-55 minutes, until topping is golden brown and berries are bubbly. Cool 10 minutes. Serve warm with ice cream or whipped topping.