I juiced my peeled apple seconds. What makes the foam on top? It seems to have good flavor, but this juice is going into the fermenter for apple cider when I collect enough (freezing until then) so I'm wondering how much sugar is in the foam.

  • This may be more suited to the homebrewing SE. – baka Sep 6 '11 at 12:41

The foam is probably made up of various proteins and carbohydrates. If you have a refractometer, you can collect some of the foam and let the bubbles fall down, and then put it on the measuring window of the refractometer, just like you would use it for the must for a wine or wort for a beer.

Foam doesn't contain proteins. Mostly glucose, air and water. There might be some Vitamin C.

Your Answer

 
discard

By clicking "Post Your Answer", you acknowledge that you have read our updated terms of service, privacy policy and cookie policy, and that your continued use of the website is subject to these policies.

Not the answer you're looking for? Browse other questions tagged or ask your own question.