Sauntering Vaguely Downward

I'd say "no thank you," and leave both of them for people who actually want them. My capacity for eating sweets may SEEM unlimited, but my capacity for eating sweets without ill effects actually does have a limit, and I should save it for things I really enjoy. (And not cause more social awkwardness than absolutely necessary by asking "is there any dairy in this?" when I don't care deeply.)