Combine 1 1/2 cups corn masa + ¼ tsp salt + 1 cup warm water in a large bowl.
Using your hands, knead the mixture into a dough whose texture resembles play-dough. If necessary, add water to the mixture by wetting your hands and kneading. If you add water directly to the mixture it might become too wet and start sticking to your hands. You will either have to let it sit to dry (approx 5-10 minutes) or add more masa.
Pinch a small portion of dough and roll into a ball, 1-2″ in diameter. Place in a tortilla press and press into a 6″ round tortilla. (Or use a rolling pin and a glass jar.)
Cook on the griddle for 1 minute. Flip and cook again for 1 more minute.
Remove from the heat and keep covered. Serve warm.