The more slowly you sweat the onions and the celery the better the flavor.
Add a little salt with every step.
If you are making a homemade stock you can put corn cobs in the stock for extra corn flavor.
You can also reserve a quarter of the cooked corn and puree it to add to the soup for a creamier texture.
If there are leftovers, you will need to adjust the texture again when you reheat the soup. Add some stock or water, adding the liquid slowly so that your soup doesn’t get too runny. This should be done on a stove top on low heat.