Mix flour and salt in a bowl. Crumble fat into flour until pebbly. If you have a food processor, use it. Run on the dough setting for ~10 seconds.
250 g AP flour, 4 g Diamond crystal kosher salt, 62.5 g Crisco
Pour hot water (190F) into mixture and stir until shaggy dough forms. Use a wooden spoon at first so you don't scald yourself. The water will cool rapidly.
137.5 g very hot water
Knead the dough 1-2 minutes until smooth.
Then put in a bowl and cover and rest 30 minutes.
Portion dough: 75g for burritos, 30g for street tacos.
Roll out dough balls with a rolling pin.If you're struggling to roll them, toss in AP flour and shake off excess. Heat cast iron skillet to medium-low.
Cook tortillas ~30-60 seconds overall, flipping when bubbles form.
Transfer to warm towel to continue cooking.