In a medium sized bowl, mix together the masa flour and water. Stir together to combine, adding a little more water if needed to form a dough. Let mixture rest for 5 minutes. Using your hands, knead dough for a few minutes until dough is smooth and easy to work with.
Divide dough into about 18 balls (should be about golf ball size or a little larger). Take a plastic freezer bag and cut two two large squares (at least 6x6 inches). Place a ball of dough in between the two plastic sheets and, using a tortilla press or rolling pin, flatten to form a thin circle about 4.5-5 inches in diameter.
Preheat a large griddle or cast iron pan over medium-high heat. Cook formed tortillas, in batches, about 1-2 minutes per side, or until cooked and browned in spots. Serve warm.
Recipe by Wright Family Table at https://www.wrightfamilytable.com/homemade-corn-tortillas/