Aziraphale makes a soft noise, a quiet whuff of breath, that is meant to be a laugh. It never sounds quite the same in this form, just a near mimicry. While Crowley might be trying to dissuade him away from his initial opinion, his apparent pie grudge only serves to do the opposite.

Sounds like something a fae would get riled up about.

"A piece of pie?" he asks quietly. His arms slowly unwind from around Crowley, fearful that he might be making him uncomfortable.

"Don't the fae get rather vengeful over stolen food?"