OK, well.........
I've already published the "sous vide" method of cooking steaks with a post-sear for grill-marks. It's still great. Particularly with a sprinkle of steakehouse seasoning and a wood fire quick-sear at the end. However, what it can't do is get a real steakhouse crust on the steak. SOME (not all, some) steakhouses put a heavy crust on the steak while still managing to keep the center at medium-rare (or whatever). They do this with a "salamander" that is like 1800 degrees F. No matter what you do, other than using a blow-torch (which I've seen video of people doing on the grill) you can't get that salamander-level heat in a home kitchen.
So you need an alternative method. It turns out that cast iron pan-frying is a good way to do it. Note the use of butter in the video at the end too.
Also, to dispel some steak myths:
1) It's OK to season your steak with more than
salt and pepper. I've heard 1000 times "that's all you need for a good steak" and while it's true that you can use only that if you wish, most steakhouses have a seasoning blend of some sort.
2) "Only flip it once". Wrong. Tests have shown you can get more even cooking and probably better crust if you flip the hell out of it. In fact the technique shown in the video does just that.
3) "Just steak". Finishing it is just as important as cooking it. The seasonings are often added near the END of the process, so they don't burn and turn bitter. That includes the butter too. Also, it's not uncommon for steakhouses to have some form of au jus on the plate, or in our case we can have a pan sauce made from the seasonings/oils in the pan when done.
DOs:
1) Do use as thick a steak as you can get. If your store has a meat counter, have them cut it 1.5 to 2 inches thick. This technique won't work for thin cuts. They'll be overdone before you can build a crust...use the sous vide method instead.
2) Do let the meat warm for a 1/2 hour before you cook it. And make sure the surface is dry. However, you should only
salt it immediately before you start searing. Don't let
salt sit on the meat or it will get tough. Along the same lines, I don't recommend marinating it in anything containing salt if you marinate your steak for some reason.
Here's the video: (BTW...I hate the rub as I don't do coffee...I'd substitute something better)