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Can I substitute Carrot Juice for Tomato Soup, in 'Tomato Soup cake'? Do I need to adjust the recipe in other ways?

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    if you use carrot juice, why not simply make a carrot cake instead of a tomato soup cake ?
    – Max
    Aug 17, 2016 at 15:31
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    what is it about this "Tomato Soup Cake" that inspires you to make it? Could you not just find a cake recipe that doesn't feature tomato soup (it's hardly a typical ingredient.) Aug 17, 2016 at 15:33
  • It's a family recipe and I like it; but I happen to have some carrot juice and was curious if i could use it to make a similar spice type cake Aug 17, 2016 at 16:03
  • Look at the sugar content of the carrot compared to the tomato. Generally, carrots have more sugar than tomatoes. Aug 17, 2016 at 17:52
  • @Sue lovely of you; works for me and I'll delete the comment in the interest of a cleaner SE.
    – Giorgio
    Sep 22, 2016 at 19:10

3 Answers 3

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Tomato soup is thicker and richer than carrot juice. Using carrot juice will change the moisture content of the cake, and it will not rise or bake properly.

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Grab some vegetable juice (V8 or something like it) and bring it to a gentle simmer. Put a teaspoon of corn starch in 3/4 tablespoon of water, stir the mixture rapidly for a bit, then stir that rapidly into the vegetable juice. Taste for salt. Bring it briefly to a rolling boil and then take it off the heat. It should coat the back of a spoon.

Keep stirring, occasionally as it cools, and you'll have something you can use. You can't directly substitute carrot juice for condensed soup, and simply thickening carrot juice in a similar manner as what I described above is going to give the cake strange sweet and wet spots after it bakes. I share Sharlyn's concern about the cake rising properly and evenly.

You could try a puree of carrot, thicken it a bit as described above, and go with that, but the minimal viscosity you need is probably that of vegetable juice after being thickened.

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Adding a similar amount of juice as what is contained in a can of soup (10-11 ounces) might be too much liquid since the soup is condensed (tomato paste, corn syrup, flour). I haven't tried it, but it might work if you used 1/2 cup of juice, and increased the flour by 1/4 cup.

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