I’m not a big fan of basic birthday cake, and by extension, cupcakes. But. I have to believe if you spice up a basic cake batter, I might try a portion should I be offered. I made half a box of yellow cake mix for the husband’s recent birthday, but I forgot all about flavouring it because I wanted to try futzing around with the icing in a can to make a galaxy looking effect for him. It wasn’t special beyond the icing effect which turned out ok. He liked what I was going for.
Anyway, back to the flavour matrix. There is a Youtuber who did a taste test on most of the above and she only deemed a few of them worth the effort. If you care, here is her full video.