Most Helpful Guy
If you are in the USA, and the Twinkies were in a common area (not a bedroom that was only hers) then it was legal. Technically, you can legally even take the TV, sofa, stove, refrigerator, and anything else that is in a common area if you are also paying rent where you live.
Most Helpful Girl
Just replace the twinkies you ate and apologize to her. Buy her a new box. Tell her you had the munchies and couldn't think of anything else.