It’s important to make sure that you’re using active yeast that has not expired. If you’re not sure about the yeast, combine it with the water and add sugar and let it sit for 5-10 minutes. If it bubbles then it’s working fine, if not, then it should be tossed and you need a new one.
Yogurt can be substituted with buttermilk.
The cast-iron skillet MUST be hot (more like medium-hot) to let the bread rise and create the air bubbles, but not too hot as that can burn the bottom. If you don’t have a cast-iron, non-stick, ceramic, or stainless steel pan can be used might need a little brushing of oil.
Store at room temperature in a Ziploc bag for up to 2 days, or in the fridge for up to 5 days.
Freeze in Ziploc bags for up to 3 months, then reheat in the microwave or in the oven.