alt Hacker NewsDepends on the chocolate type and how much you're eating. Milk chocolate has very low levels (~2mg per 28oz), but dark chocolate is ~15mg per 28oz. Coffee, at 24oz, would be around 275mg, depending.
I find it hard to believe that some folks would feel the caffeine in chocolate unless they ate an entire dark chocolate bar in one sitting, but I suppose it's possible.
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I think that 28oz of dark chocolate, whether weight or volume, would be a ludicrous amount to eat in one sitting. A chocolate bar is about 1.5 oz (and 1 fluid ounce of water weighs 1 ounce, at least to a rough approximation), so to eat 28 you'd need to eat nearly 20 chocolate bars.
For that matter 24oz is rather a lot of coffee to drink at once. I brew my daily coffee with 200g of water, or only about 7 floz.
You might want to double-check your figures.
Ghiradelli claims their dark chocolate has 20mg per oz and their milk chocolate has 6 mg per ounce. [1]
That would mean eating a standard 3.5oz/100g chocolate bar would have 70mg of caffeine for dark, or 21mg for milk.
While 3.5oz is a lot in a sitting, 70mg is equivalent to a smallish cup of coffee.
[1] https://www.ghirardelli.com/product-faqs#:~:text=Dark%20choc...