In a medium bowl with your gram scale, measure out the first 4 ingredients. The water, buttermilk, active starter, or sourdough discard, and oil. Mix together by hand or with a spoon or Danish dough hook, until mixed well.
Then add/ weigh out the flours and sea salt and mix/knead by hand until there are no more dry pieces left in the bowl.
Cover with a tea towel and let the dough rest for 30 minutes.
Next take and weigh out your tortillas; dividing them into equal pieces.
75 g each for a large tortilla
or
60 g for a medium to small tortilla
Take each one and roll it on the counter to create dough balls. You want to create tension on the surface of the dough.
Place on a parchment lined baking sheet or any parchment paper lined airtight container and place in fridge covered with lid or plastic wrap for 1 hour or up to 6 days.
I usually put mine in the fridge and cook them the next day.