I've had a photo saved from several years back of little fabric hearts that have been stuffed to make them "puffy" and then stitched around the edges. I've attempted numerous times to emulate them, but this time, I think I finally nailed it. 

I've done my best to incorporate thickened glaze into my list of favored mediums. It really does hit the spot for certain designs that just don't work any other way. If you add lots of powdered sugar to glaze icing, it eventually becomes something you can mold in your hands. It's still sticky, but doable.

I'm so glad it worked for these puffy hearts. The moldability provided a way to make the stitch holes right after putting the glaze on the cookie. It gave exactly the effect I was going for! 👍