I'm doing a AG oatmeal stout. Recipe has 300g roasted barley in 23 litres (6.5% of grain bill). Going into brew kettle I'm really not getting that distinctive stout burnt taste. Will this come through later (ie stick with recipe) or should I add the rest of the roasted barley I've started steeping (200g)? 49 minutes left of boil! Thanks in advance!