1
Carefully remove the corn kernels from the cobs and transfer them to a large bowl. To maximize the sweet corn flavors, use a knife to scrape off any remaining bits of corn and the milky liquid from the cobs.
2
In a heavy large saucepan, heat the vegetable oil over medium-high heat. When hot, add the chopped shallots, grated ginger, and minced garlic. Sautรฉ for about 2 minutes, or until the shallots begin to soften and become translucent.
3
Add the fresh corn kernels and any liquid collected in the bowl to the saucepan. Cook for about 3 minutes, stirring occasionally until the corn is heated through.
4
Now, add the halved corn cobs and low-sodium chicken broth to the mixture. Bring the soup to a boil, then reduce the heat to low. Cover the pan and let it simmer gently for 30 minutes or until the corn is very tender. After cooking, remove and discard the corn cobs.
5
Blend the soup in batches until smooth. Pour the pureed soup into a large bowl and stir in 1 cup of buttermilk until well combined. Cover the bowl and refrigerate the soup until it's thoroughly chilled, which should take at least 3 hours.
6
Once chilled, taste the soup and season with salt and pepper to your liking. For serving, ladle the soup into 8 bowls. Drizzle each bowl with additional buttermilk, sprinkle with fresh chives, and enjoy!