this post was submitted on 23 Apr 2024

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Today I Learned

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TIL about raisin juice concentrate - some truly Goldbergian food science (www.delightedcooking.com)

submitted 6 months ago by [email protected] to c/[email protected]

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[–] [email protected] 23 points 6 months ago (2 children)

The concept of raisin juice might seem a bit odd, since raisins are, after all, dried grapes, and grape juice is an already well known substance. However, raisin juice is not the same thing as grape juice. Because raisins are dehydrated, their juice is in turn a highly concentrated substance, with less water than grape juice. It is also intensely sweet, as typically sweet varieties of grapes are used to make raisins, and their sugar content increases with dehydration

For those who can't tell if this is a joke or not

[–] [email protected] 3 points 6 months ago

Absolutely not a joke! I was eating some granola bar and noticed in the ingredient list. I thought it was some ridiculous labeling thing and had to look it up. The bit you quoted was what I figured it was, but it still sounds absurd on the surface.

[–] [email protected] 0 points 6 months ago

Might be real, but it's still a joke. Grape juice concentrate.

[–] [email protected] 16 points 6 months ago (1 children)

Grapeception

[–] [email protected] 1 points 6 months ago (2 children)

So basically its like boiling grape juice to make it more concentrated?

[–] [email protected] 9 points 6 months ago

Nope, the process gives a different flavor. That's partially because of the varieties used, and partially the heat changing the juice.

Think of it more like balsamic vinegar. You can kinda get a similar taste to barrel aged by taking grape must and mixing it with other things, but it is still a different taste, and the viscosity can't even be close. So, when you reduce the faux balsamic with heat, you and to with a very different taste indeed.

The process of dehydration is slower and gentler than a reduction can be, so the flavor gets preserved better. When you then extract the juice, you end up with a less altered taste. Mind you, it's also different from the grape the raisins were originally from; dehydration does change things some by itself.

[–] [email protected] 1 points 6 months ago

Its concentrate juice of concentrate grape. Dry grape will leave only the concentrate flavor of grape, than make dry grape tea and concentrate that too.

[–] [email protected] 11 points 6 months ago* (last edited 6 months ago) (3 children)

Some wines use partially raisined grapes to make a very sweet flavor profile, like [Sauternes.](https://en.wikipedia.org/wiki/Sauternes_(wine))

[–] [email protected] 6 points 6 months ago

And my understanding is that Amarone wines also let the grapes dry out a little to concentrate the flavors. Not raisined, but just a bit shriveled. I love Amarones.

[–] [email protected] 4 points 6 months ago

Commandaria is another famous, and ancient, sweet wine made with dried grapes

[–] [email protected] 2 points 6 months ago

When I read the link, I immediately said to myself "Well, I guess it's just like prune juice." But that still doesn't mean it doesn't seem strange on paper.