Do you specifically love rainbow cake more than any other type of cake? Show off your very specific love!
I tried to be haughty about desserts in jars and how it's such an obnoxious fad like taxidermy in bars and guys who ride bikes and grow beards. But then I had an amazing goat cheese and berry mousse in a jar and changed my mind. Put it all in a jar! All of it! I take it back! Jars are charming and it could probably be scientifically proven that they make food taste 25% better.
Nothing says love like a heart shaped dessert delicately dusted with cocoa powder. Sadly, I fear cocoa powder as it seems inevitable that I will accidentally breathe some of it in when I take the first bite and then I'll cough all crazy and destroy everything. How I wish I could enjoy a dusted treat.