Dishwasher Sous Vide Steak

Preheat your dishwasher to the hottest wash cycle without detergent. This will serve as the heat source for the sous vide process.
Season the steak generously on both sides with kosher salt and black pepper, ensuring it is evenly coated.
Place the seasoned steak into a large resealable plastic bag, squeezing out as much air as possible before sealing it tightly. For extra security, double-bag the steak to prevent leaks.
Put the sealed bag directly onto the top rack of the dishwasher. Close the dishwasher and run it on the hottest wash cycle without detergent. Let the steak cook for the duration of the cycle, approximately 60 minutes.
Heat a heavy skillet (preferably cast iron) over high heat on the stovetop. Add the olive oil and let it shimmer, about 1 minute.
Carefully remove the steak from the plastic bag and pat it dry with paper towels. Place the steak in the hot skillet and sear for 1 minute on each side, or until a golden-brown crust forms. Add the butter to the skillet during the last 30 seconds of searing, tilting the pan to baste the steak with the melted butter.
Transfer the steak to a cutting board and let it rest for 5 minutes before slicing. The steak should be medium-rare with a crispy, caramelized exterior and a tender, juicy interior. Slice against the grain and serve immediately.