Brownies for Breakfast is standard grief food in my house. Someone dies (far too frequent an occurance), gets dumped, etc... it's time for brownies for breakfast. I completely and totally stole that from the movie Practical Magic. And you know what? It really, really works.
My favorite uncle had a saying (and was a very well known man, and the saying has caught on in certain areas) "Life's uncertain. Eat dessert first." And he did. All the time. Every so often, I'll poke my head in the room and ask my son "Hey kiddo! Is life uncertain?" and he'll blink for a moment and shout "Yes!" and we'll eat dessert before dinner, or at whatever random time that happens to be.
The day after your birthday? There's only 1 breakfast allowed. Happy Cake.
We don't eat a lot of sweets/desserts/etc. But when we do, we usually break "the rules" about them.