Bisquick Impossible Pie Recipe, made in a 10 or 12 inch Cast Iron Dutch Oven. Corrie's Notes: I made a cranberry/apple impossible pie in my 12 inch dutch oven. I had to add about 1 cup extra of the Bisquick, and added another 30 minutes in the oven (with a lid). The other thing to note is that the pie will disintegrate if you try to pull it out in one piece--cut it into wedges first! Super yummy.