I used the Cozy Mittens Die-namics and Sweet Tooth felt . MFT Die-namics cut easily through felt. I usually run the felt through my die cutter twice to insure I have a clean cut.
I machine stitched the mittens on with gold thread. I ran a blanket stitch around the mittens and then added a little batting to the inside of the mittens. I hadn't done a blanket stitch for a while so I just did a search and there were lots of tutorial to refresh my memory!