Who doesn't love biscuits in just about everything? Mmmm...buttermilk biscuits. The other name for this could be soup in biscuits. It was a little runny, but once you mush up all the biscuits it thickens right up. As always, I kind of combined a couple recipes to go with what I had in the cupboard. The recipe I used for the casserole called for store bought biscuits, but I had everything to make from scratch buttermilk biscuits. So I did that. You can find a great recipe for buttermilk biscuits in the Pioneer Woman Cookbook and it may be on her website as well.
As for the casserole, in a large sauce pan just add chicken, peas, mushrooms, salt, pepper, onion, and cream of chicken soup. Heat it all up until bubbling and then pour it in the a casserole dish. After that add the biscuits, store bought or not, on top and pop it in the oven for 25-30 min at 375. It's great because it really is a simple dish, that will be great in those chillier months.