The Blog Blanket CAL is a great stash buster. It is based on different styles of granny-type squares, 6 in total. The pattern was released weekly on my blog.
I used aran weight yarn, but you can use any you like.
There is a discussion thread on my Ravelry group Agrarian Artisan Designs, please join in the fun!

If you prefer a printable pattern, then you can purchase it instead.