[NCRadioMan]

The tobacco sits in a room with whatever the infusion ingredient is and tobacco soaks it all up. Or some tobacco is aged in wiskey to other barrels used for alcohol and the baccy picks up those flavors. As for ACIDS, over 200 different natural herbs and Asian oils line the walls of his factory’s cuarto aromatico (aroma room) where the tobacco sits and soaks it up. I also think that some company's will use an extract directly sprayed onto the tobacco.

A non-infused cigars tobacco can have alot of natural flavors like leather or coffee beans, chocolate, spice, etc.

You can infuse your own cigars if you let one sit in a bag or box with a shot of your favorite alcohol and the cigar will pick up that flavor.