answer:Do you mean that the recipe calls for your brew to be set “in a dark/cold place”—that is, with the words “dark” and “cold” being separated (or joined) by a slash? Is that what you’re asking about? If so, that’s exactly the reason I so dislike that all-too-common use of slashes: nobody reading it actually knows if it means “and,” “or,” or “and/or.” And sometimes it makes a difference. In this case, I’d be inclined to interpret it as meaning both; but this question is probably best answered by somebody with *******-making experience rather than English-analyzing experience. It doesn’t really matter what the expression is or ought to be so much as what the procedure ought to be.