Popa,
on yom kippur we have a din of malachim which is why we say boruch shem loud. If a malach pretends to eat, as the malachim who visited Avraham Avinu did, it probably doesn’t have a din of achila. Better eat it up today.
btw, why didn’t you reveal this custom of yours on the Chicago thread? It would have been much easier for them to look out for a guy who shechts a todah during pesukei d’zimra than to look for someone hanging out at Starbucks.