holaCarlos

 Nice! So it would also work to clear cookies/cache?

I probably should have tried that first.

For anyone suffering from the same problem, I was able to redeem a cupcake after switching browsers (Firefox to Chrome). Doh!

This didn't work for me today. Is anyone else having trouble?

Edit: I tried it on a side with a different birthday pet and it worked, then I adopted it onto another side and it worked too. So you can get multiple cupcakes from the same pet. They may have imposed a per-account cupcake limit, or maybe it was just glitched. I think I've had 4 cupcakes on the account it didn't work on? In any case, worth looking into.