That may be true, but as you said, it does look like a business card. The health dept would see right through that, especially since the blog address you provide leads to a blog where you have
"If you have a question about ordering cookies, please use the "Contact Me" button below!" written.

Whether or not you list prices, any reference to ordering cookies is enough to get you fined. And in your original post, you stated the woman presented it as a good
business opportunity for you. If you are completely honest with yourself, is it a business opportunity, or purely a donation to help a cause and out of the love of sharing your craft? Please, be careful!
Obviously it depends on the state you live in. You need to figure out if the rewards outweigh the risks, and also what you yourself are comfortable with.
Just for the record, I am not a bakery! I am a stay-at-home mom just like you, who is fortunate enough to reside in a state that permits residential kitchens. I have worked very hard and paid a lot of money to have a newly licensed, inspected and insured home business.