A student recently came to me with a problem with very short chips from around the green. He almost yipped these shots and needed a solution. He was ok as long as he could putt but when there was more fringe to negotiate and get the ball over he was scared and without a shot that would work.
Here is what we did.
We took his 8 or 9 iron and let him grip the club exactly like his putter which he did by placing in the palms of his hands. This grip helped take the wrist action out of the shots. We had both thumbs come off of the grip of his iron at a 45 degree angle.
From here he simply made his normal putting stroke with no hinge in his wrists. this simple stroke allowed the club to pop the ball up over the fringe and then tumble towards the hole like a putt.