Preheat water bath using your sous vide to your desired temperature. Medium rare 130º, Medium 135º, Medium Well 145º.

Season steak well on both sides.

Place the steak inside your plastic bag and if using a vacuum sealer, seal the bag. If you do not have a vacuum sealer, you can use a zip top bag that you seal almost all the way. Slowly add the bag to the water bath until just below the top is submerged. Then seal the rest of the bag to ensure most of the air is out.

After 60-90 minutes remove from the water and place the steak on a paper towel lined plate. Pat the them dry.

Heat oil in a large skillet over high heat. Once the oil is shimmering you know it is hot enough.

Carefully place the steaks in the pan with a little bit of butter and cook for about 30-45 seconds a side, until it is nicely browned.

Remove from the pan and serve.