When it comes to cooking flank steak on a cast iron skillet, the temperature of the skillet is crucial. Too hot and your steak will burn, too low and you risk overcooking it.

So, how hot should your cast iron be for flank steak? Let’s dive in and find out.

Understanding Flank Steak

Before we get into the specifics of cooking flank steak on a cast iron skillet, let’s take a moment to understand the cut of meat itself. Flank steak is a long, lean cut of beef that comes from the abdominal muscles of the cow. It’s known for its intense beefy flavor but can be tough if not cooked properly.

Preparing Your Flank Steak

To ensure that your flank steak cooks evenly and stays tender, it’s essential to prepare it correctly before cooking. Start by patting your flank steak dry with a paper towel and seasoning it generously with salt and pepper. You can also marinate it for extra flavor.

Heating Your Cast Iron Skillet

The ideal temperature for cooking flank steak on a cast iron skillet is between 375°F and 450°F (190°C – 230°C). To achieve this temperature range, start by preheating your skillet over medium-high heat for at least five minutes.

Testing Your Skillet Temperature

A quick way to test if your skillet has reached the desired temperature range is to splash some water onto its surface. If the water sizzles immediately and evaporates within seconds, then your skillet is ready to cook the flank steak.

Cooking Your Flank Steak

Once your skillet has reached the optimal temperature range, add some oil to it and wait until it starts smoking slightly. Then carefully place your seasoned or marinated flank steak onto the skillet.

For medium-rare doneness, cook your steak for 3-4 minutes on each side, flipping it only once. For medium doneness, cook it for 4-5 minutes on each side. Keep in mind that the cooking time may vary depending on the thickness of your flank steak.

Resting Your Flank Steak

After cooking, remove your flank steak from the skillet and let it rest for at least 5 minutes before cutting. This allows the juices to redistribute throughout the meat and ensures that it stays tender and juicy.


In conclusion, the optimal temperature range for cooking flank steak on a cast iron skillet is between 375°F and 450°F (190°C – 230°C). By following these guidelines, you can achieve a perfectly cooked flank steak that’s juicy, tender, and full of flavor. So fire up your cast iron skillet and get ready to enjoy a delicious meal!