His compliment just makes her smile grow to the point that her nose wrinkles a bit. And after that, she's just trying to get herself under control so that she seems a lot cooler than she actually is. Needless to say, it doesn't garner the desired effect. Instead she just ends up doing a half snicker thing that might have had a snort in there somewhere, then she's blushing and the whole thing just went downhill really, really fast.
"You look nice, good and great too. All at the same time. In fact, brownie points for multi-tasking in the looks department." Her head tilts a bit. "Or... boy scout points? Not brownie points. And wow, brownies sound really good. But so do cheesy fries. Wanna get some cheesy fries?"