The 75% ethanol-water mixture for the V2 came from the fermentation of potatoes - this had been a deliberate choice based largely upon availability concerns. By the time the V2 came online (namely: after D-Day), the Germans were in a complete rout on the Eastern Front, so Ukrainian grain would have been nigh impossible to come by anyway.
SunkenCiv: Methanol and LOX was the combo used in the V2 [...]
The V2 was fuelled with ethanol (specifically: a 75% ethanol-water mixture); and LOX was the oxidant.
SunkenCiv: Not sure what fuel the V1 used.
The V1 was fuelled with gasoline (specifically: Leichtbenzin Oktan 75).
Incidentally, some folks here have been incorrectly conflating the V1 (which was a jet-powered cruise missile - driven specifically by a Pulsstrahltriebwerk) with the V2 (which was a ballistic rocket) under the collective heading of "rocket." Just wanted to clarify that that was not the case.
Regards,
Thanks!