During the frying process, a gas stove on high heat can better lock in the moisture and flavor of the steak, making the meat more tender. At the same time, it takes time to preheat a cast iron skillet, and using high heat can heat the skillet to the right temperature more quickly. It is important to note that when using a cast iron skillet to sear steaks, the first time you sear both sides for 90 seconds, followed by another 30 seconds on each side.