You could use a clean ear swab. Yes, the cotton ones. Break off the fuzzy ends so you’re just left with the plastic stick. It’s thin, it’s cheap, and it’s probably in your bathroom drawer right now.
I’m only telling you this because you asked. But please, for your sake, don’t tell anyone. Keep this as your dark baking secret. Your toothpick substitute is between you and the cake now.
So go on. Bake that cake. Lose another toothpick. And now you have zero excuses. You’ve got spaghetti, chopsticks, and maybe a sketchy ear swab waiting in the wings. You’re ready for anything.