Pretend you are super, hungry, in the Sims 3, as your hunger meter is almost to it's death. But as you cook: Oops! You burnt a dish! And you are almost dying of starvation! You don't want your Sim to ...
I'd just eat the food. Who cares? There are no negative moodlets, except just a really short "Good Meal" moodlet. Plus he can still earn cooking skill!