Sous vide cooking has been gaining popularity in recent years due to its ability to produce perfectly cooked meals with minimal effort. One of the most popular cuts of meat to cook sous vide is flank steak.

But how long can you leave it in the sous vide? Let’s find out.

First, it’s important to note that the thickness of your flank steak will determine how long it needs to be cooked. A 1-inch thick flank steak will require a shorter cooking time than a 2-inch thick one. Additionally, the desired level of doneness will also affect the cooking time.

For a medium-rare flank steak, which is typically recommended for this cut, you can leave it in the sous vide for anywhere between 2-4 hours. This range allows for some flexibility and gives you the opportunity to adjust based on your preferences.

However, if you prefer your steak more well-done, you’ll need to increase the cooking time. For a medium-well flank steak, leave it in the sous vide for around 4-6 hours. And for a well-done steak, cook it for at least 6-8 hours.

It’s important to note that these times are just guidelines and may need to be adjusted based on personal preference and other factors such as altitude and water temperature.

To ensure that your flank steak cooks evenly and retains its juices, make sure to season it generously with salt and pepper before placing it in a vacuum-sealed bag. You can also add herbs like rosemary or thyme for additional flavor.

Once the steak is cooked to your desired level of doneness, remove it from the sous vide and pat it dry with paper towels. Heat up a cast iron skillet over high heat and sear each side of the steak for about 30 seconds until nicely browned.

Finally, let the steak rest for a few minutes before slicing against the grain and serving.

In conclusion, cooking flank steak sous vide is a great way to achieve a perfectly cooked and tender steak. The cooking time will vary based on the thickness of the steak and desired level of doneness, but a medium-rare flank steak can be cooked for 2-4 hours. Remember to season generously, sear after cooking, and let it rest before serving for the best results.