Happy Birthday, Blue! I hope you enjoy your mug cake. Here's a cake batter martini to go with it:
(Also, this is the best mug brownie recipe I've found:
https://kirbiecravings.com/fudgy-mug-brownie/Though of course I had to tweak it with whole wheat flour, more cocoa, less sugar, some stevia, a drop of almost extract, and water to replace most of the oil.)