I love Blackberry Cobbler. The recipe I use is super easy. If you use frozen berries, don't thaw them first, they will bake fine from frozen.
Blackberry Cobbler
1/2 cup (1 stick) butter, melted
1 cup of sugar
1 cup self-rising flour (1 c flour, 1/2 tsp salt, 1 1/2 tsp baking powder)
1 cup milk
2 cups blackberries
Mix together melted butter, sugar, and flour. Wisk in milk. Pour into buttered baking dish. Spread berries on top of batter. Sprinkle with 1/4 cup sugar. Bake at 350 degrees for 1 hour.