Do you have a chocolate chip cookie recipe that will create soft cookies? The recipe I have does fine, just my cookies are not as soft as I like unless I need to adjust the cooking time.
You’re on the right track with adjusting the cooking time. A minute or two less will often produce a softer cookie. Also, once you remove them from the oven, cookies continue to cook on the hot baking sheet so remove them off the sheet right away to cool. I have one other suggestion: brown sugar. Try switching to brown sugar and see if that helps. (I use half brown & half white sugar in mine)