Here’s a step-by-step on how to make flour tortillas.
The poster, abrahamdiaz writes “This is the traditional recipe made in northern Mexico. Ingredient measurements should be followed exactly as shown in instructions; water quantity may vary depending on desired mixture texture. This recipe makes about 18 tortillas.”
His recipe uses vegetable shortening – since that’s a modern product – that wouldn’t be traditional. Maybe in the past they would have used lard. But he anyway, gives a substitution measurement for vegetable oil.
Here’s mszeineb’s veg oil version: