Note: If you have access to masa harina, substitute 2 cups masa harina for the three corn ingredients above (Harina P.A.N., cornmeal, and finely ground corn flour). Keep all other ingredients and measurements the same.
Combine dry ingredients: In a large mixing bowl, whisk together the Harina P.A.N., cornmeal, finely ground corn flour, and salt until well blended.
Add liquid ingredients: Create a well in the center of the dry ingredients. Add the lime juice first, then gradually pour in the hot water while stirring with a wooden spoon or fork.
Form the dough: Mix until a cohesive dough forms that holds together without being overly sticky—think pie dough consistency. If too dry, add water 1 tablespoon at a time. If too sticky, dust with a bit more corn flour.
Rest the dough: Wrap the dough tightly in plastic wrap and let it rest for 20 minutes. This allows the flours to fully hydrate and makes rolling much easier.
Portion the dough: Unwrap the dough and shape it into a rectangular block about 1.5 inches thick. Using a sharp knife, cut into 1.5-inch cubes (you should get 15-18 pieces).
Form balls: Roll each cube between your palms to create smooth, round balls. Place them back in the bowl and cover with a damp kitchen towel to prevent drying.
Heat your pan: Warm a cast iron skillet or heavy-bottomed pan over medium heat. The surface should be hot but not smoking—a drop of water should sizzle and evaporate quickly.
Press or roll: Using a tortilla press, flatten each ball between plastic wrap or parchment paper. No press? No problem—roll them paper-thin on a lightly floured surface with a rolling pin. Place immediately into the hot pan.
Cook the tortillas: Place one tortilla in the hot pan and cook for 1-2 minutes until the edges start to lift slightly and small bubbles form on the surface. Flip and cook the other side for another 1-2 minutes.
Keep warm: Immediately transfer cooked tortillas to a cloth-lined bowl and cover tightly. The steam from the hot tortillas continues the gentle cooking process and keeps them soft and pliable.
Serve warm: Keep covered until ready to serve—these beauties are best enjoyed hot and fresh.