What's your best "one mug" dessert?

I've tried a few over the years and have never found one that is good enough to make again. Any suggestions?

Buttercup 🏵️

the one with Nutella 😋

Zoe Albright

This one is supposed to be really good. Haven't tried it myself yet but I'm hoping to soon.

Onyx of DarkLite

I like them all. Sorry I'm no help.