This Buttermilk Cornbread with Vidalia Onions is a delicious twist on traditional cornbread. The addition of sweet Vidalia onions adds a subtle sweetness and depth of flavor to the cornbread. The buttermilk gives it a moist and tender texture, while the cornmeal provides a slightly gritty and nutty taste. Serve this cornbread as a side dish with chili or barbecue, or enjoy it on its own as a tasty snack.