Adding vegetable or fruit pulp to soap?

[CloseShave]

After I make a juice I am left with lots of pulp (not dry, but not very wet).

Has anyone ever used vegetable or fruit pulp in their soap?

I was thinking that something like cranberry pulp or spinach pulp could be used as a natural color.

 

[judymoody]

Cranberry will go brown. Spinach might stay green.

The pulp would have to be very fine - like a puree, or it could go moldy in your finished soap.