Carolyn,

Beth brought home some Russian "air chocolate" two years ago.  She identified it as the least expensive of the bars she brought back but one that is popular in Moscow.  We too thought the texture was odd and the taste unfamiliar, but not bad.  However, we preferred some of the other chocolate bars which came in a vast variety.  Perhaps you should do some chocolate research by buying a few more bars of other varieties!  Mmm.  Sounds good to me.  If Bulgarian chocolate is similar to Russian chocolate, you're in for a treat.