How much caffeine is in a small/medium piece of chocolate cake?

I do not consume caffeine anymore (it’s been about 8 years or so). I just ate a small/medium sized piece of chocolate cake. I wonder if anyone has a clue about how much caffeine would be in that? By the way, I do not eat/drink caffeine anymore due to panic disorder and anticipatory anxiety disorders. Thanks for your input.
I also take Xanax, Buspar and Lexapro and have heard/read caffeine is not good to mix with these drugs. Does anyone have any good or bad experiences with consuming caffeine and any of these medications together?

i know how you feel, i get scared when i drink caffine, it does make my anxiety more out of control, it’s crazy like if you are a crackhead or somethin’… and more chances of panic disorders may happen due to that…

but anyways…
caffine in chocolate doesn’t hold as much as in soda like coca-cola… the thing you have to worry about is what else is in that chocolate cake… if some one made it from scratch? i believe would be better than you buyin’ it already made with all kinds of perservatives, other sugars, etc. That way you know what’s in it… but a small servin’ of choco cake shouldn’t be that bad, but another question… what is a small serving to you? plus you need to find out, how sensitve to caffine you are, if it’s really serious, your doctor can probably tell you how much you can tolerate….

i found this on the web
(Myth: Chocolate is high in caffeine.
Truth: The amount of caffeine in a piece of chocolate candy is significantly lower than that in coffee, tea or cola drinks. For instance, a 5 oz cup of instant coffee has between 40 and 108 mg of caffeine, while a one oz milk chocolate bar contains only 6 mg and many confectionery items have no caffeine at all. )

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