<human>: Give me the gist of the text in a nutshell

I know this might sound stupid, but please hear me out. A few days ago Amy decided to make a very large batch (25-50+) of weed cookies for her and her college buddies. I didn't know it at the time, but she ended up opening and using my brand new packs of salt, flour, sugar, and butter that I had purchased from the store the previous day. I had planned to bake banana bread and cupcakes (which I do still have enough ingredients for) but am I right to feel like she was rude to go ahead and open things she knew wasn't hers? And before anyone asks, no she didn't even offer me any of the cookies. I'm trying to have a good relationship with her and we have talked to each other about sharing food in the household (we don't, besides some spices and oils).
<bot>: Roommate uses my unopened staples to make cookies. We do not share food. She didn't offer me any. How do I address this?