Fill pot or plastic container with water, set the immersion circulator to your desired temperature and time, and start it.
Season the steaks with salt, freshly ground black pepper, garlic powder and add 1 Tbsp of butter and a couple of springs of fresh thyme to each steak
Place each seasoned steaks in a FoodSaver® bag and using the FoodSaver® vacuum sealer vacuum seal the steaks.
Transfer the steaks to the water and sous vide them for at least 1 hour, or according to the time & temperature chart below. Once the steaks are cooked, remove them from the water. You can sear them right away or refrigerate them for a few days later.
Heat oil over medium-high heat. Sear steaks for a couple of minutes on each side. Reduce heat to medium and add 4 Tbsp of butter to the skillet. Baste steaks in butter for a couple of minutes on each side. Serve immediately.