Regular Polenta flour cooks in about 45 minutes. Stirring Polenta can be very hard work. Pre-cooked polenta flour is available in most grocery stores and Italian delis. It needs only a few minutes of preparation, minimum stirring, and doesn’t make lumps. Many Italian manufacturers offer a pre-cooked, good quality product. If using one of these, follow the manufacturer’s directions for time and quantity of water.
These are the basic instructions (check manufacturer’s directions).
7 cups (1600 cc) water
2 teaspoons salt
2 1/2 cups (12 1/2 oz – 350 g) corn flour
Bring 5 cups (1150 cc) of water to a boil in a saucepan. Place 2 cups (450 cc) of cold water in a bowl. Drop all the polenta flour into the cold water at the same time. Stir to combine, until a uniform mixture is obtained.
Pour the polenta mix into the boiling water, stirring constantly to combine.
Reduce the heat to low and cook stirring constantly for about 5 minutes or until the polenta is thickened.