I've been making a lot of green smoothies (using a Vitamix), and they have a tendency to end up with about 2 inches of undrinkable froth/foam at the top. It seems a higher percentage of veggies vs fruit makes it worse, and spinach is particularly bad.
2 questions:
What causes this? (my wife suspects it has to do with the fiber not breaking down -- which seems plausible, but it's just a guess)
And what can we do to prevent it? Is there anything we can add to get them to more fully integrate?
A sample recipe, if it helps:
- 1-2 handfuls spinach
- 1 apple
- 1" piece ginger
- 1 persian cucumber
- 1 stalk celery
- juice of 1 lemon