In that event, keep the nose slightly below the horizon for 30 seconds and keep out of buffet then very gently level out. Not forgetting to set cruise power as part of the un-stalling procedure.
If you are cruising at 350 this won't help. It will need at least 4 to 5 degrees below the horizon and once the stall warning stops all the power(which is not much) you have and may be forward trim if you are in it for a while as 447 was. Since there is no speed it will be a journey from low speed buffet to shall I say high speed buffet or rumbling before you recover flight path. Very unnerving to say the least.