[Modernist Cuisine] Mushroom Ketchup (5•13 and 6•217)

[Judy Wilson]

A lot of people want to know how long this will keep. Coauthor Maxime Bilet answered this on eGullet a while back: "We can‚’t give you an exact time as we have not tested it ourselves. We do expect though that you will experience some syneresis, or ‚“weeping,” just as you do with any condiment kept in your fridge." He also suggests using a little xanthan gum to help this. Has anyone been keeping some stored in the back of their fridge? What's the result?

[Anonymous Modernist 310]

We washed and filled a old tomato ketchupbottle with the mushroom ketchup.After two months in the fridge there is a slight syneresis thatdisappearwhen you shake the bottle. The taste seem unchanged.

[Anonymous Modernist 353]

I made this last night. I was a little confused by the 'simmer ... liquid has evaporated ... 35 mins'. I simmered mine until pretty much all the liquid had evaporated which I think is incorrect as it took over an hour and then was way too thick to blend (in a blendtec). I had to add some water back in.

By liquid has evaporated do you mean all the liquid has evaporated, most of the liquid, some of the liquid? Next time I'll just stop at 35 minutes although this batch will probably last a year.