Credit: Pupusa recipe, New York Times Cooking, and Curtido recipe, Tastes better from scratch PUPUSAS INGREDIENTS 2 cups masa harina ½ teaspoon table salt 2 cups boiling water, plus extra water as needed. 2 teaspoons vegetable oil, divided. 2 ounces cotija cheese, cut into 2 pieces. 8 ounces Monterey Jack