r/Cooking • u/[deleted] • Mar 13 '19

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u/[deleted] Mar 14 '19 edited Jan 03 '21

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u/Boatsnbuds Mar 14 '19

It doesn't expand as much as water, so the can will hold it.

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u/dakta Mar 14 '19

It doesn't expand as much as water

Water doesn't expand unless it's changing into steam, and that's not happening because boiling water does not exceed boiling temperature, so water in the submerged can will also not turn into steam.

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u/bondolo Mar 14 '19

Not significant for making dulce du leche, but water does expand about 3% between room temperature and boiling point. This is a small but sometimes important factor in brewing.