1 1/2 to 2 cups water
1 T olive oil
Start by putting 2 cups of masa flour in a large mixing bowl. Add 1 1/2 to 2 cups of very warm water and a splash of oil to the masa flour (according to the directions on the package, some brands may call for different amounts of water). Mix in and let sit for 5 minutes or so. Begin working the masa with your hands to make the dough. Knead the dough for several minutes. If at any point through the tortilla making process the dough seems too dry or too wet, add a little more water or masa to the dough.
Take a piece of the masa dough and shape it into a ball the size of a plum, or slightly large golf ball.