Looks like someone already did: https://www.ryanpickren.com/starbucks-button

Awesome read. Just enough info given to attempt yourself, without giving it away.

Agreed. I just found my new weekend project (though maybe not for a couple weeks because the AWS IoT buttons are sold out).

Couldn't you just hit the button on a home bean to cup machine and save the journey?

I like getting out of the house in the morning. Starbucks is a ~4 minute walk away. I get to chit chat with folks, take the dogs out with me and get a feel for the weather that day. If I made my coffee at home, I would be on my laptop and totally forget about making it.