I'm about to make 5 gallons of a rather light lager. The recipe calls for 6.5 lbs DME (munton's extra light), but I could only order two 3 lb bags and a 1 lb bag. Would it be a disaster to toss that extra half pound of DME in the boil, or would it probably work out alright? What would the main effects be - darker, higher OG, sweeter?
If your yeast are in great shape and you are pitching the right amount, then there is no need for concern over it being a little sweet in the end.
An extra half pound will raise the gravity by only 4-5 points for a 5 gallon batch. So go for it.