These are melt in your mouth buttery rich oatmeal shortbread cookies. It was just what I was looking for. The key to this texture is in the confectionary sugar and the cornstarch. I added a little vanilla. They need to cook until just starting to turn a little brown on the edges. If they don't cook enough they will fall apart when removing them. I let them sit on the pan a few minutes to rest before removing them. Great recipe, thanks for sharing.