First - get your glasses ready.
Crush up your Oreo cookies - I used my Vitamix and it worked well.
Melt the butter and mix with the cookie crumbs.
Spoon and press into the bottom of your serving dishes.
Set them aside while we work on the filling.
In your mixer, blend together the first 3 ingredients and the salt. Mix very well.
Then, spoon in the cool-whip and stir by hand, otherwise you'll deflate the lightness of the whip.
Be sure you mix it all the way...you don't want streaks.
Once it's all well mixed, pipe or spoon out into your dishes.
Put in the fridge for at least 3 hours to chill. Top with hazelnuts, shaved chocolate, more cool-whip, or leave them plain like I did.