There should be no water whatsoever on the bowl or on the beaters.
Be patient while beating, I wasn't. I stopped beating just before it reached the perfect consistency, that is why my cookies are flat.
I thought 1/2 cup was too sweet, despite reducing to this as to what was mentioned in the original recipe. Next time, I would go for 1/3 cup for this quantity.
Spray your pan so that the cookies come out after baking - I forgot to do that!!!