Hello, i am supposed to be bringing a blackberry cobbler to Thanksgiving tomorrow and when i agreed to it, I had no idea how complicate the different recipes sound. Anyone that has made this, your help would be superior. I have 3 cups of blackberries and an already pre made crust. but my question is, I don't have baking powder or anything to make it, but Ive heard it can be replaced with egg whites? and I have all purpose flour not rising, does it have to be rising flour? The stores are all closed by now, so any help is appreciated! Thanks!