Reader Brandi writes in to ask why her recent attempt to make a fresh pineapple JELL-O ring ended in disaster. Brandi, the answer is that fresh pineapple contains an enzyme by the name of bromelain which is a protein-digesting enzyme, and gelatin is a protein. Canned pineapple will work in a JELL-O mold because the heat of the canning process denatures (chemistry talk for “messes up”) the bromelain enzymes.
I know what you’re thinking. Or at any rate I know what you might be thinking. Oh hell who am I kidding, you’re almost certainly not thinking it but I needed a transition. What on earth is a protein-digesting enzyme doing in a pineapple? It’s a good question, because really, what use does a fruit have for such a thing?
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