Derek gaped at her for a moment. It wasn't often that people did nice things for him just out of the blue, for no reason. Normally it was to pay him back for something or to beg a favor out of him (like changing their grade). Someone just being nice...he didn't really get it.
"Thank you," he said, finally, trying to hide just how flabbergasted that made him. He opened the box and took out one of the cookies, breaking it in half and taking a bite, offering her the other half.