Adding fruit to beer, Sour Cherry Imperial Stout

Adding fruit to beer can be difficult, when do you add, how much do you add, how do you prepare the fruit and how long do you leave the fruit in contact with the beer are all things you need to decide.

Sour Mash Wit

There are many ways to add sourness to the finished beer.  Simply adding lactic acid, long fermentation with wild yeast and bacteria, acidulated malt and the only method I have yet explored till now the sour mash.