Meme's Blackberry Cobbler

This is so simple, and so tasty, it has quickly become a family favourite. I use our cast iron frying pan to make it and in the summer I throw it on the BBQ so we don't heat up the house too much; the rest of the year it's simple to just mix it up and throw it in the oven when I'm prepping dinner. I've made it with frozen blackberries and fresh, and other mixed fruit - blueberries are a particular fave.

Suggestions: if you have a fairly small pan, be sure not to overfill or you'll get batter dripping down the sides of the pan. I usually put 3 cups of berries instead of four in ours, which is 10" diameter.