Fill a big pot with water. For medium rare, attach your sous vide machine to the side and set the temperature to 130 degrees.
Step 1
Season both sides of steaks with Kosher salt and pepper. Add crushed garlic and rosemary to a quart or gallon zip lock bag.
Step 2
After sealing the bags ¾ full, carefully lower them into the warmed water, allowing the water pressure to remove excess air surrounding the steaks.
Step 3
Seal the bag completely and clip it to the side with a chip clip or clothes pin after submerging.
Step 4
Time 1 hour. Steaks can be left in water for 4 hours without losing texture or flavor. Remove steaks from bag, brush off garlic and rosemary, and put aside.
Step 5
Use a cast iron skillet to heat oil on high. Steaks should be seared undisturbed for 1-2 minutes till golden. Flip the steaks.
Step 6
Add butter, garlic, and rosemary to the pan. Flip your pan onto a hot pad to catch butter.
Step 7
Scoop and drizzle butter over steak for 1-2 minutes with a large spoon.Serve steaks with pan juices.