I boiled all the bones from a roe deer for stock and got about four litres all of which was solid when refrigerated. I took half of it and left it in a pan in the bottom over of an Aga for two days to gently evaporate and become more dense. The result turns out to be a great colour and smell, but will it doesn't solidify. Why? The remainder, though less concentrated will not come out of the jug even if tipped upside down.
Why will the dense, concentrated stock not solidify to jelly
stock
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Best Answer
Sounds like the temp of the Aga was a bit low. From the GMIA Gelatin Manual (page 11):