Hi Sue- I had been on a quest for an amazing sugar cookie recipe also! The one I found is by Autumn Carpenter. It has a small amount of cream cheese that makes them softer but still have enough firmness to decorate.
'I tried them last night and they are FABULOUS! They have nooooo spread when baking. I will probably experiment with flavoring, but this is a good one. The recipe is in Autumn's books as her basic sugar cookie. I don't want to post the recipe since the book is trademarked. Good luck!