As I had a bolt of muslin, I went that way. Yes it is a bit heavier than usual with 2 layers of fabric but as I'm making these as lap quilts for elderly folks, they will enjoy the extra warmth. I starched my muslin, then cut them out to size. I'm using up a bunch of my scraps this way too. Craftsy also had the basic same pattern but smaller plus yet another one which you start with a foundation but cut off the excess afterwards. This one makes a star in the center when you put the 4 pieces together. I've made one of each so far and am on 2 more but this time I'll just leave the foundation on both of them. This is a great way to use up your scraps as they seem to multiply during the night.
Suz in Iowa