Instant Corn Masa: To prepare delicious tortillas, just add water. Instructions for the Masa: Combine 2 cups of Maseca Nixtamasa corn flour with 1-1/2 cups of water. Mix thoroughly for 2 minutes until you a soft dough. If dough feels dry, add teaspoons of water (one by one). Instructions for Tortillas: Divide dough into 19 equal balls of approximately 1 ounce each. Cover with a damp cloth to keep dough soft and moist. Line a tortilla press with 2 sheets of thick plastic wrap. Place ball between the two sheets of plastic and press until you each tortilla measures 5 inches in diameter. Heat skillet or griddle on medium-high heat. Carefully peel off tortilla from plastic wrap. Cook each tortilla for 30 seconds on each side, turning the tortilla 3 times. Cover tortillas with a cloth napkin to keep them soft and warm. To make tostadas, let tortillas cool down before frying in off. Makes 19 tortillas.