http://www.food.com/recipe/flour-tortilla-recipe-204109
Excerpt:
“Directions: 1 Sift the flour, salt & baking powder into a large mixing bowl. 2 Into the dry ingredients cut in the shortening, or add oil if you are using this option, & mix with your fingertips to combine. 3 Add the milk or water, working the liquid into the dough until a sticky ball forms.”