When making larger amounts of gravy do you have to increase the amount of roux I usually use 4 TBSP of fat and 4 TBSP of flour but wondering if making larger amount of gravy like maybe 8 cups would you increase amount of roux?
I would assume yes.
you use 4tbsp flour and fat for what amount of liquid ?
if you double the liquid, you should double the roux.
If there's not enough roux, then your gravy will be too "liquid".
for reference this recipe : http://www.chef-menus.com/large_quantity_recipes_gravy.html