Originally Posted by DSeibel
OK...confused. Your telling me to use DME instead of sugar even though kits dont normally have enough fermentable sugar. Or are you saying by adding DME I will be "topping up" the amount of fermentables provided in the kit while also adding flavour and body. Perhaps in this case I will do as the kit says with 1KG of sugar and later experiment with DME when I am buying not kit ingrediants.
Yes, to the second! By adding DME, you are adding fermentables that will provide body and flavor.
Simple sugar is fermentable, but is known to thin and dry a beer. Because it's fully fermentable, the beer doesn't have the "body" and residual unfermentables that adding malt extract does. A beer with 2 pounds of malt extract and 2 pounds of sugar generally will not taste very good. Not horrible, but not very good. Adding less sugar but still having enough fermentables for a decent alcohol content will give you a good beer.
I guess an analogy would be something like this. You want to make spaghetti sauce to feed 10. You only have enough "real" ingredients (your canned hopped LME) for 5. But you want to feed ten! You can add some tomato juice (the sugar), or more tomato sauce (the DME). The sauce made with the added juice won't be horrible. It just won't be the best sauce you can make. You can add some more tomato sauce (but without the seasoning [hops]) and have a pretty decent spaghetti sauce. Still not ideal, but not too bad.
If I were making the kit you have, I'd use no more than 1 pound of sugar. However, it's your beer and you can do whichever you want. That's the beauty of homebrewing- you can make your beer however you like it.