The key to the tortillas not breaking is to warm them. Try some of these effective methods to warm soft corn tortillas: Open Flame On A Gas Stove - If you have a gas burner, light the flame and char the taco shell flipping it over with a pair of tongs. The goal is to warm the tortilla so it is pliable. Grill - Using the same concept as above, light the grill and char the tortillas until slightly warm. Microwave - grab 3-5 tortillas and wrap them in a damp paper towel. Place them in the microwave and heat for 20-30 seconds until each tortilla is warm. Oven - this is how restaurants typically warm tortillas. Wrap 3-5 tortillas in a piece of aluminum foil. Set the oven to 350°F and bake the stacks of tortillas for 15-20 minutes until the tortillas are warm. Skillet - Add a little bit of olive oil in the skillet and swirl the tortilla around until its well coated. Heat each side for 20-30 seconds and then start making the tacos.