LOL That IS a lot of oil to throw out! What were you thinking?! (Just teasin' ya)
You're in luck... there may be a way of saving it. Mosey on over to RDak's experiment here:
OK a Crazy Idea
He/She is experimenting with using some of the KOH to make the paste and reserving some of the KOH to use in the Dilution phase. Makes sense to me. So, what I would suggest to you is to make up a batch of KOH solution using the missing amount of KOH. Warm the paste back up. Add the amount of boiling water you intend to use for the dilution water; add the KOH solution. Say a quick prayer to the soaping gods and hope it works! GOOD LUCK!
PS: Use your head and be patient. Don't panic. Just think it through as you go along. Might take all day; might not. ???