Nor will anything kill the toxins that have already been excreted by the mold...We got our hands on a big cache of HUGE Bur Oak acorns last year - they were humongous and I looked forward to cutting them up and drying them into little hard treats for our overwintering guests. They were all thoroughly inspected - intact and not discolored. They did not float. But they had been on the ground for a little while...
So I then boiled them to sterilize them, because we had P. Tiddlywinks who had been a previous "pet" and she had never had wild food - we figured we would introduce it to her slowly.
After I boiled them, I dried them in the oven at 175 for about 12 hours. They felt really dry. I did not shell them thinking that they would "keep"
Then I put them in our "nut" drawer - a filing cabinet which makes a distinct sound that Roo learned meant he was about to get a treat.
Went to go get them 2 days later to finally shell them and cut them up - and I could "feel" something different about them. I mean with my allergies I could "feel" it - it wasn't a smell. And they had let off a great deal of water vapor which had collected on the inside of the cabinet...
So I cut the first one open - it was covered with mold between the nut and the shell. I am sure the boiling killed any live mold/mildew, but that obviously did not "kill" the mold spores. ( I have a strong background in biology, and I was still surprised)
SO - remember that acorn shells are porous, and water can get in or out. This promotes mold growth. ANY mold growth can result in mycotoxins.
You would have to get the acorns fresh under the tree and before they get rained on, then do the worm detecting float test, then open them, cut them, heat dry them, then freeze them. My mistake was letting them sit.
No squirrels ever even came in contact with those acorns. I threw them away in the regular trash. It was a loss, but I learned how to process Bur Acorns and now the pieces make GREAT little treats!