I think cooking a soup in his kitchen on the second date may be perceived as moving in. Maybe not technically moving in, but definitely making yourself at home.

Edit: Never too early to start communicating though:

"Hey, I have no plans today, and I want to make soup. Would it be cool if I cooked us some soup? I can head home afterwards so you don't get sick of me"

Or some variation. Point is, ask him, give him a chance to get on the crazy/chemistry train with you.