From America's Test Kitchen Season 11: Italian Comfort Classics
If you don’t stir polenta almost constantly, it forms intractable lumps. We wanted creamy, smooth polenta with rich corn flavor, but we wanted to find a way around the fussy process.
The prospect of stirring continuously for an hour made our arms ache, so we set out to find a way to give the water a head start on penetrating the cornmeal (we prefer the soft texture and nutty flavor of degerminated cornmeal in polenta). Our research led us to consider the similarities between cooking dried beans and dried corn. With beans, water has to penetrate the hard outer skin to gelatinize the starch within. In a corn kernel, the water has to penetrate the endosperm. To soften bean skins and speed up cooking, baking soda is sometimes added to the cooking liquid. Sure enough, a pinch was all it took to cut the cooking time in half without affecting the texture or flavor. Baking soda also helped the granules break down and release their starch in a uniform way, so we could virtually eliminate the stirring if we covered the pot and adjusted the heat to low. Parmesan cheese and butter stirred in at the last minute finishes our polenta, which is satisfying and rich.
Serves 4 as a main course with a topping or 6 to 8 as a side dish
Coarse-ground degerminated cornmeal such as yellow grits (with grains the size of couscous) works best in this recipe. Avoid instant and quick-cooking products, as well as whole-grain, stone-ground, and regular cornmeal. Do not omit the baking soda—it reduces the cooking time and makes for a creamier polenta. The polenta should do little more than release wisps of steam. If it bubbles or sputters even slightly after the first 10 minutes, the heat is too high and you may need a flame tamer, available at most kitchen supply stores. Alternatively, fashion your own from a ring of foil (see Homemade Flame Tamer step by step below). For a main course, serve the polenta with a topping (see related recipes) or with a wedge of rich cheese or a meat sauce. Served plain, the polenta makes a great accompaniment to stews and braises.