Mix the dough: Add all ingredients to a food processor, stand mixer, or mixing bowl and combine until a shaggy dough forms.
Knead until smooth: Turn the dough onto a work surface and knead until a soft, smooth ball develops.
Let the dough rest: Allow it to rest for 15–20 minutes so the masa fully hydrates. Skipping this step can make pressing difficult.
Divide the dough: Cut into 12 equal portions and roll each into a ball.
Press evenly: Using a tortilla press, flatten each ball into a thin, even circle.
Preheat the skillet: Heat a cast iron skillet over medium to medium-high heat until thoroughly hot.
Lightly oil if needed: Add a very small amount of avocado oil and wipe it across the surface — you want a barely-there layer.
Cook the first side: Place a tortilla in the skillet and cook until bubbles form and light golden spots appear, about 1–2 minutes.
Flip and finish: Turn and cook the second side for 20–30 seconds until additional brown spots develop.
Cover and steam: Transfer to a plate and cover with a slightly damp towel to trap steam and keep the tortillas soft and pliable.
Repeat: Continue cooking the remaining tortillas, stacking and keeping them covered as you go.
Notes
Depending on the brand of masa you use, you may need to add a little more water. You are looking for a play-doh consistency. If you think your mixture is too dry, add an additional tablespoon of hot water. Likewise, if you feel the mixture is too wet, sprinkle in a little extra masa. Different brands will behave slightly different.