This is a shot in the dark, but worth that shot. A few years ago, I was in Tel Aviv and went to a little bakery/chocolate place. I'm trying to find the name of it. It's just south of the Friday shuk and near the Israel Center for Certified Public Accountants (my dad's a CPA so I took a picture of the building on the walk back). The entrance is down three steps and I had a really delicious frozen chocolate mousse bar.
I'm trying to send a friend there on her trip.