Well, now I'm definitely making muffins.
Why? Because my interviewer got the time wrong and called me an hour and a half before I was expecting her to. But we had a nice laugh about that ("Either time went faster than I thought, or my clock's an hour and a half slow!") and got down to business. I think it went well; it sounded like I was giving her the answers she was looking for.
It's definitely a job I'm capable of, at any rate. She'll get back to me next week (Thursday or Friday) about a face-to-face interview. I really hope I get one (and then get the job).