This chowder is quick and inexpensive. The corn I used is frozen fresh sweet corn from the summer - it is mixed with a little milk, sugar and sale before it is frozen. I am not sure what the equivalent would be so I just used plain frozen corn. You may need to adjust the liquids a bit if you use plain frozen corn. Next time I will had pepper jack cheese when I serve the soup. Canned chipotle peppers would be good as a substitute for green chilies.