Originally Posted by GeesSRT8
How much fermentable sugar do I use during the end of boil?
What do you mean by fermentable sugar at the end of the boil? Are you asking about adding sugar to the boil? If that the case then none. Your fermentables are the sugars converted from the grains during the mash. You should not add any other fermentables to the boil other than that. ( specialty recipes aside)