Heat a cast iron pan. Roll tortillas out into a 9 inch circle. Add tortilla to hot skillet one by one and cook for about one minute on the first side and 30 seconds on the other side. Don't stack tortillas after you cook them, or the ones on the bottom will get soggy.
Lay each tortilla in a tray. Once they cool down a little bit, you can put them in a tortilla warmer or another container.
Keep tortillas in the closed container in your fridge for 3-4 days.