I would add anywhere from zero to maybe 1 oz. Traditionally you wouldnt really want it to be noticeable. That being said, Americans love to break tradition so if thats your take, go as crazy as you want with it.
And for heavensakes, same with the salt. Go easy on it. An ounce seems like far too much. Try 1 teaspoon then go from there. Add at bottling or kegging time until it tastes good.