Question

how to make jiffy cornbread moist without sour cream?

Answer 1

minced green chilies, chipotle in adobo sauce, grated onion, shredded cheese, etc. These would all add moisture to your cornbread.

Answer 2

First I’ve never heard of someone putting sour cream in jiffy cornbread so I would just follow the box put sour cream in sounds like some nasty white people stuff