Craving a delicious steak dinner but not sure how to cook flank steak in your cast iron skillet? Don't worry! Perfectly searing a flank steak is surprisingly easy, and a well-seasoned cast iron skillet is just the tool for the job. This guide walks you through each step of cooking juicy, flavorful flank steak right on your stovetop. We'll discuss how to cook flank steak in cast iron.