Since I’m low carb, I rarely make cakes these days, but on the days when I just really really crave cake - I use the microwave and a mug:
Chocolate Cake in a Mug
https://www.thepioneerwoman.com/food-cooking/recipes/a84317/chocolate-cake-in-a-mug/
I made one of those from a pre-made mix, once. It was awful - and not in the original sense of the word :-).
I’ll try your suggestion.