Mix Ingredients: In a large bowl, combine the masa harina and salt. Gradually add the warm water, mixing with your hands until the dough comes together.
Knead the Dough: Knead the dough for about 2-3 minutes until it's smooth and pliable. If the dough feels dry or crumbly, add a little more water, 1 tbsp at a time.
Rest the Dough: Cover the dough with a damp cloth or plastic wrap and let it rest for 15-30 minutes. This helps the dough fully hydrate.
Form Dough Balls: Divide the dough into 12 equal pieces and roll each piece into a ball, about the size of a golf ball.
Flatten the Tortillas: Place a dough ball between two pieces of plastic wrap or inside a cut-open ziplock bag. Use a tortilla press, a flat-bottomed pan or a rolling pin to flatten the dough ball into a thin circle, about 1/8 inch thick.
Cook the Tortillas: Preheat a dry skillet or griddle over medium-high heat. Carefully peel the plastic wrap off the tortilla and place it on the hot skillet. Cook for about 30 seconds on each side, or until the tortilla has light brown spots and puffs up slightly.
Keep Warm: Transfer cooked tortillas to a clean towel and cover them to keep warm and soft while you cook the remaining tortillas.