I most often use a cast Iron as well as it be cold af outside. What im about to type out will definitely take some trial and error, but i promise once you master the shit it will be your preferred method for cooking steak. It just takes time.
Can be any cut of steak, but i mainly use ribeye. The Fat content really makes a difference reverse searing, so just keep that in mind. If you're doing something less fatty like a sirloin, you may need to adjust your time, but here is my process for reverse searing:
Salt (sea salt or Rock salt or something more crystal than regular table salt) your steak and let it get to room temperature. Pre Heat oven to 225.
Get a baking sheet with a wire rack and put the steak on the wire rack and bake at 225 for about 45min. If you don't have a wire rack, you can put the steak directly on the oven rack. Just put a baking sheet or something below it to catch the drippings.
A bit before your steak is done baking, get your cast iron HOT. Like a very High Medium - High heat. Depending on what oil you use should determine the temp. You want the oil hot, but not smokey. I myself use olive oil which isnt a very high heat oil so I have to do Medium heat.
Once the skillet is hot with the oil, place the steak in the cast iron. Dont touch it, just let it sit and cook for only One minute each side (if on medium heat, try cooking for a 1min 30 sec or 2min)
After the steak is flipped and cooks for the opposite side for one min, turn the heat to Low-Medium and add 2 tablespoons of butter and any herbs or garlic to the skillet. Tilt the skillet towards you and let the melted butter pool then take a spoon and spoon it over the steak. This will add awesome flavor and also crisp up the crusts.
If the steak has strips of fat or extra fat on the sides of it, use tongs and put that fat in the hot grease for a minute or two so it can render.
Once done rendering the fat, set the steak on a cutting board, plate or wrapped in foil and let it rest for 10 mins.
Definitely takes some practice to get to your personal preference, but i promise its the GOAT method if you dont got a grill.
heres a probably much easier recipe to read:
https://www.jessicagavin.com/how-to-reverse-sear-a-steak/