Mix the dough. Add the masa harina and the salt to a medium bowl. Whisk together to combine. Add the warm water and mix to combine. Start with 1 and a half cups and test to see if you need more. (note 2)
Rest the dough. Cover the dough with a kitchen towel and let it rest for 10 minutes.
Scoop the dough. Use the cookie scoop to scoop the corn tortilla dough. Roll each scoop into a ball and set them aside until you are ready to press the tortillas.
Press the tortillas. Using a tortilla press, press each ball of doing between plastic. You can use plastic wrap or a freezer bag for this. (*see notes) Don't stack uncooked tortillas on top of each other, they will stick. Layer them with parchment paper if you arent putting them directly in the skillet.
Cook the tortillas. Heat a skillet on medium-high. Once your skillet is nice and hot place the tortilla in the skillet. Heat for 40 to 60 seconds on the first side then flip the tortilla over. Cook for another 40 to 60 seconds on the second side. The tortilla will bubble up. You want to have toasty brwon spots all over the tortillas.
Store cooked tortillas into a tortilla warmer. Place each cooked tortilla in a tortilla warmer or in a dish that you can cover with a lid or towel. Cook tortillas one at a time until you are through the entire batch.
RECIPE TIPS
Masa harina. Which means cornflour in Spanish. However, masa harina is made from nixtamalized corn. It is treated with lime which gives it masa harina its characteristic texture. Maseca brand is commonly available in the Mexican section at most grocery stores. You can buy Maseca in yellow, white, or blue corn varieties. I've found the Azul variety is less common but you can find it online or in Hispanic grocery stores.
What to look for: The dough should be smooth but not sticky. The dough should stick together and not be crumbly. If the dough is crumbly then add more water a few tablespoons at a time. If you press your fingers into the dough they should come away clean. If they don't then the dough is too wet and you need to add more masa harina.