Polenta

• 1 1/2 cupscoarse stone-ground cornmeal · polenta grind, not instant, not fine cornmeal, not masa
• 6 cupswater · or 4 cups water and 2 cups whole milk for a richer version
• 2 tspkosher salt · added to the liquid before the cornmeal goes in
• 1 pinchbaking soda · about 1/8 tsp, optional, it speeds hydration noticeably
• 3 tbspunsalted butter · cold, cut into cubes, stirred in off the heat
• 3/4 cupParmigiano-Reggiano · finely grated, added off the heat
• 2 tbspextra-virgin olive oil · to finish, or in place of the butter for a dairy-lighter version
• 1/4 tspblack pepper · freshly ground
• 1 cupwater · extra, kept warm, for loosening as it thickens

Method

1. 1

   Buy coarse stone-ground, and know what you are not buying

   Polenta is a grind, not a species of corn. You want coarse stone-ground yellow cornmeal, where the pieces are visibly distinct like coarse sand. Instant polenta is precooked and dried and gives you something smooth in five minutes with almost no corn flavour. Fine cornmeal turns to paste. Masa harina is nixtamalised and belongs in tortillas. Grits are the same idea from a different corn variety and cook similarly, so a bag of stone-ground grits is a legitimate substitute.

2. 2

   One to five by volume, not the one to four on the bag

   One and a half cups of cornmeal to six cups of liquid. Pack instructions almost always say one to four, which produces polenta that sets stiff in the pot before the granules have finished hydrating, which is exactly the gritty texture people complain about. More water buys you time. If it thickens past the point you want before forty-five minutes are up, add warm water a quarter cup at a time. You cannot add water back into a granule that has already set.

3. 3

   Salt the liquid, not the finished pot

   Two teaspoons of kosher salt into the water before the cornmeal goes anywhere near it. Salt dissolved in the cooking liquid seasons each granule as it hydrates, from the inside. Salt stirred into finished polenta sits in the liquid between granules and tastes like salt on top of bland corn, which is the same principle as salting pasta water. Under-seasoned polenta is the second most common complaint after grittiness, and this is the fix.

4. 4

   Rain the cornmeal in with a whisk going, then put the whisk away

   Bring the salted water to a boil, then pour the cornmeal in a thin steady stream from your fist while whisking continuously with the other hand. Thirty seconds of pouring, and never dump it in at once, because the outside of the clump gelatinises instantly and seals dry meal inside it. Once it is all in and there are no lumps, switch to a wooden spoon. A whisk used through the whole cook aerates the polenta and makes it gluey.

5. 5

   The heat is lower than you think, and a diffuser earns its keep

   Drop the heat until the surface only blips every few seconds, which on most gas ranges is the lowest setting the burner will hold. Polenta at a real simmer spits molten cornmeal, and it burns skin, so a splatter screen or a partially set lid is a genuine safety item rather than a nicety. If your stove will not go low enough, a heat diffuser or an inverted cast iron pan under the pot solves it. Scorched polenta cannot be rescued.

6. 6

   Forty-five minutes, stirring every five, and here is what stirring is for

   You do not need to stir constantly, despite the folklore. You need to stir well every five minutes, all the way into the corners with a wooden spoon or a flat-edged spatula, to stop the bottom catching and to break up the skin forming on top. That is about nine stirs across the cook, each of twenty seconds. Set a timer if you are doing anything else, because the one time you forget is the time it catches.

7. 7

   How to tell it is actually done, without guessing

   Take a small amount on a spoon, cool it for ten seconds, and press it against the roof of your mouth with your tongue. If you feel individual grains, it is not ready, no matter what the clock says. Done polenta is creamy with a faint pleasant coarseness rather than distinct grit, and it pulls away from the side of the pot when you drag a spoon through it. Coarse grinds can need an hour. Taste rather than time it.

8. 8

   The pinch of baking soda, and why it works

   An eighth of a teaspoon of bicarbonate in the water raises the pH slightly, which helps the starch granules swell and break down faster, and it can cut fifteen minutes off a stubborn coarse grind. This is the same chemistry that makes beans cook faster in alkaline water. Use more than a pinch and you get a soapy taste and a slick, almost slimy texture, so measure it rather than shaking it in. It is optional, not a shortcut to a half-hour polenta.

9. 9

   Butter and cheese off the heat, always

   Kill the heat, wait a minute, then beat in the cold butter cube by cube and the grated Parmigiano in two additions. Cheese added to polenta over direct heat separates, and you get oily strings sitting on the surface instead of a glossy emulsion. Cold butter emulsifies more reliably than soft butter for the same reason it does in a pan sauce. Taste for salt one final time here, because the cheese has just added a significant amount.

10. 10

    Serve it immediately, because it starts setting the moment it stops moving

    Soft polenta has a working window of about ten minutes on the stove with the lid on, and it thickens continuously as it cools. Warm the bowls. If it stiffens while you plate, beat in a splash of hot water off the heat and it comes straight back. A skin on top is normal and stirs back in. What does not come back is polenta that has been held for an hour, which sets into a block regardless of how much liquid you beat into it.

11. 11

    The leftovers are the best part, so plan for them

    Pour the remainder into an oiled loaf pan or a rimmed sheet, smooth the top, and refrigerate. In four hours it sets firm enough to slice. Cut it into fingers or wedges, brush with olive oil and either roast at 425F for twenty-five minutes, griddle in a hot cast iron pan, or shallow fry until the outside is crisp and the inside stays creamy. Set polenta keeps five days refrigerated and it fries better on day two than on day one.

12. 12

    What goes on top, and the rule that governs it

    Polenta is a base for something with liquid and acid, because on its own it is rich and one-note. A slow-braised ragu, mushrooms cooked hard in olive oil with garlic and thyme, sausage and peppers, braised greens with chili and lemon, or a simple tomato sauce with a lot of basil. It is naturally gluten-free, which makes it the most useful starch to keep on hand for a mixed table, and the vegan version made with olive oil and nutritional yeast instead of butter and Parmigiano is genuinely good rather than a concession.

13. 13

    The oven method, for when you will not stand at the stove

    Whisk the cornmeal into boiling salted water in an oven-safe pot exactly as written, cover, and put it into a 350F oven for forty minutes. Stir once at the twenty-minute mark. Enveloping heat means nothing catches on the bottom, so you get two of the three stirs back and the pot needs no supervision. It comes out marginally less creamy than the stovetop version because you have agitated it less, and beating in the butter and cheese vigorously off the heat closes most of that gap.

14. 14

    Grits, cornbread cornmeal, and what actually substitutes

    Coarse stone-ground grits behave near-identically and can be swapped one for one, allowing five extra minutes. Medium-grind cornmeal sold for cornbread will make something edible in half the time, thinner and less characterful, and wants the ratio pulled back to one to four. Instant polenta is precooked and dried and is a genuinely different product, not a time-saving version of this one. Masa harina is nixtamalised with lime and tastes of tortilla, so it is not a substitute in any direction.