Ponycountdown can actually count down in Planck times.
 
Let’s assume this cake is based on Planck units. That would mean the cake is extremely small, not very heavy (though immensely dense), extremely hot, it has an electrical resistance of 29.9792458 ohms, it’s highly pressurized, and it takes 1 Planck time to cook it. And considering how small the Planck length is (As are the derived Planck area and volume), you probably wouldn’t have seen it in the box anyway.