Where can I find dough enhancer?
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Sam is a trusted home cook.
It's a pretty broad term can mean many things.
I'm thinking your speaking of "Wheat Gluten" as that is the most common; they should have it at WFs. Just ask.
Most supermarkets have it in the baking section, along with health food stores.
Cynthia is a trusted source on Bread/Baking.
Good kitchen stores tend to carry it, and you can also order it from King Arthur.