Although one might question its authority, Dictionary.com lists the word
"proofed" as in "to become properly light for cooking" as an intransitive
verb:

http://dictionary.reference.com/search?q=proof

- Steve Brandt

"Dick Adams" > wrote in message
news
Yes, it makes sense to confirm the activity of yeast before baking with
it. But *proof* is a noun. Using it as a verb is incorrect. Wrong!

Wrong, wrong, wrong!!!