I recently read an
opinion piece published in San Francisco magazine, written by local restaurateur, Daniel Patterson, owner of Coi. Apparently he's decided to pull all corn and corn dishes from Coi's menu: "I'm tired of trying to create a balanced dish with an ingredient that tastes like it's been impregnated with simple syrup," he says.
His local source for corn,
Full Belly Farm, has stopped growing heirloom corn and this year is growing one of the modern "supersweet" varieties instead. But Patterson argues that this type of corn lacks "subtlety," and that it "has lost its distinctive flavor, echoing America's drift toward sweet, one-dimensional tastes."
I started to wonder, why would this small organic farm decide to grow a "one-dimensional" variety of corn that lacks "subtlety," and, what variety of corn does Garden of Eve grow? Is it one of these "supersweet" varieties?
I decided to do a little research, and I found out that there are actually
3 basic types of sweet corn (sweet corn is different from "field corn," from which corn flour, popcorn, corn syrup and other corn products are made):
su, se and sh2.
Su
Su ("sugary") is the original heirloom corn, containing 5-10% sugar by weight, and grown as far back as the 16th century. Some varieties still sold today were introduced in the late 19th and early 20th century, such as Golden Bantam (1902), Country Gentleman (1890) and Silver Queen (the variety that Full Belly Farm used to grow, and still a popular variety for the home gardener). These are truly heirloom varieties, have the most "corn" taste and are the least sweet of the sweet corns. Additionally, they are best when cooked within 30 minutes of picking, not making them a good commercial corn. According to
Dr. Mary Peet, of North Carolina State University: "In 24 hours after picking, sugar content declines 8 percent at 32 degrees F and up to 52 percent at 86 degrees F."
SeStarting in the mid-20th century, the se ("sugar enhanced") varieties began to be developed. They have the same tender kernels, creamy texture and "real corn flavor" as standard corn, but they start out with higher sugar content, 12-20% by weight, and because of this have a longer storage life, lasting 4-6 days with refrigeration, although they convert sugar to starch at the same rapid rate as standard corn after harvest.
Sh-2Through the 1980's, se corn was the most common commercial sweet corn, but it was rapidly replaced by patented sh2 ("shrunken-2") varieties, with even less starch and from between 22-40% sugar by weight. These varieties have the advantage that, not only do they start out with a higher sugar content than either su or se varieties, but they also convert their sugar more slowly to starch both on the plant and after harvest, meaning that these new varieties could be shipped long distances and are thus the varieties most likely to be found in the supermarket today.
So why did Full Belly switch? According to Andrew Brait of Full Belly Farm: "Silver Queen (su) was the white that first really knocked people's socks off. We ended up growing Silverado because Silver Queen is highly susceptible to corn smut. We grew Silverado (se) for many, many years until it was discontinued by the breeder Harris Moran. After a season or two of trying to find another good se, we felt like we'd come up short. The supersweets (sh2) are pretty much the be all and end all of sweet corn variety development. Because of changing consumer demand, there are so few non sh2 varieties available or in development. This year we've been growing the sexy "Xtra-Tender 374A". Despite my mourning for the lost Silverado (which was our signature corn), I have to say this new variety is darn good, and as the name says 'extra tender'."
And what is it that Garden of Eve grows? The corn we're getting in our CSA shares are one of 2 varieties: Luscious or Brocade, both bi-color (white and yellow) se varieties, with Luscious the earlier to mature (so this is probably the variety we've been getting in our CSA shares so far).
To preserve as much sugar as possible in a non-supersweet variety, like the ones we get from Garden of Eve, follow
these tips from the National Gardening Association: "Refrigerate corn if you're not going to be able to eat it right away, because the loss of sugar is much slower at lower temperatures. If you're not near a refrigerator and you have some harvested corn, keep the freshly picked ears in single layers, rather than stacking them. Corn tends to overheat inside its tight husks, so give each ear as much breathing room as possible. It also helps to cover the ears with a damp cloth."
Just like with any vegetable, the varieties of corn are rich and diverse, and so maybe, in the end, the "best" variety just comes down to your own personal taste!
