Originally Posted by SonOfGram
It doesn't, the overall overpack does, I'm no scientist, but I know that it works
, even without an overpack, when packing nakhla very dense and I mean very dense (below the rim) and applying enough heat to it will result in more flavor.
Exactly. In fact I now use a dense pack below the rim instead of the overpack. The only drawback is that it can take a little longer to get the bowl going. It's easier to heat manage that way though.