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Dining In: Chilled Buttermilk Corn Soup

There’s still time to take advantage of sweet summer corn. Fresh steamed or grilled corn on the cob is hard to beat — and I admit I’ve had my fair share of the cob this summer.

But when I overheard a fellow volunteer at Food & Friends describing a corn soup she had served at her Fourth of July get-together, something caught my ear and imagination. Buttermilk. Buttermilk, she swore, was the key ingredient in her favorite chilled soups, including this corn one she devised for this party. Unlike other dairy products used in chilled soups — yogurt or sour cream, for instance, buttermilk, she told me, adds body without coating the palate. I had never used buttermilk in a chilled soup before so this was too intriguing to pass up. I begged the recipe from Dyane, which she generously shared, along with all her hints for tweaking the recipe.

This soup calls for 2 pounds (about 1kg) of corn, and I intended to use all fresh corn off the cob. Events conspired against me when we had a guest in town and I had to prepare the soup in advance but did not yet have fresh corn on hand. Instead I took Dyane’s cue to use frozen corn, namely Trader Joe’s Super Sweet Corn, for the base, which I cooked and pureed with the buttermilk, and chilled overnight. I added fresh corn off the cob and the reserved buttermilk (per Dyane’s tip) before serving — the tender kernels added texture and an extra touch of freshness to the finished soup.

We loved this soup, as did our visitor from Cyprus. Dyane was right about how buttermilk adds depth and creaminess without heaviness in texture or taste. I would like to make this soup again while fresh corn is in season, and try it with all fresh kernels. To be honest, though, the TJ’s frozen corn was pretty darn good in this soup and left no gummy kernel skins, which is what I was afraid frozen corn would do. Another nice note was the jalapeno — de-seeded, it added little heat, but really seemed to lift and highlight the buttermilk in a symbiotic way. Don’t leave it out even if you don’t like spicy foods — it really accents more than adds spiciness.

Best of all, this was easy enough I could do it in our tiny hotel kitchenette. So if I could do it here, you can definitely do this!

Thanks, Dyane, for sharing your wonderful recipe with us, and now everyone else!

DYANE’S BUTTERMILK & TOMATILLO CORN SOUP
Serves 6 persons
Except where noted, the rest of this post will be in Dyane’s voice, as I am reprinting her recipe (with her kind permission) as she sent it to me, with minor changes for syntax and to include metric measurements.

2 teaspoons extra virgin olive oil
1 medium size onion coarsely chopped
½ lb (226g) tomatillos, husked, rinsed , and quartered
3-4 garlic cloves, minced
(I like a lot of garlic)
1 jalapeno pepper, seeded and finely chopped
3-1/2 cups (28oz/830ml) chicken stock (or vegetable stock would work)
1 teaspoon ground cumin, plus a pinch for garnish
2 tablespoons coarsely chopped cilantro, plus some for garnish
1 cup (236ml) buttermilk
(I increase the buttermilk by another 1/4 to 1/2 cup (60-120ml) depending on soup consistency while blending)
Kosher salt and finely ground pepper
2 16 ounce (1kg) frozen bags  of corn which were unthawed,
you could you fresh, can, whatever combination to make up to 28-32 ounces
Lime, lime juice
 
Directions
1. Heat the olive oil in a medium saucepan over medium heat. Add the onion and cook until translucent, about 10 minutes. Reduce the heat if the onions being to brown (you don't want any brown color in this soup)

2. Add the tomatillos, garlic, and jalapeno and cook for 5 minutes. Add the corn cook for 3-5 minutes. Raise the heat to medium high, add the chicken stock, cumin, cilantro, and cook 5-7 minutes more. Remove from heat and cool.
3. Pour the mixture into a bowl of a food processor and puree until smooth. (Note from 3T: I used a hand, or stick blender) Add the buttermilk, salt and peeper and pulse to combine. Transfer to a bowl and chill in the refrigerator.
Ladle soup into bowls and garnish with cilantro and cumin.
 
When blending I did it in batches: 3/4 of the soup was blended with the buttermilk, 1/4 was not blended with the buttermilk and this was added to the end to not have the jalapeno diluted/cooled too much by the buttermilk. Also, because I like a little more heat I increased the jalapenos and increase the cilantro per my taste.  Adjust salt and pepper.Serve this chilled. Before you do hit it with a shot of lime juice to brighten the taste. Have lime also on the side so your guests can adjust accordingly.

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Back to 3T:
More recipes with corn:
Creamy Ewa Sweet Corn Soup with Kauai Shrimp
Okra & Corn Stew with Jerk Salmon