I agree with the other Denny and Robert. I have tried brewing with maple syrup and gained nothing from it. Then, I read an article in BYO a number of years ago and, according to the study, the best way to get that wonderful maple flavor in your beer is to use what they referred to as “maple water”, which is the stuff that leaks from the tree before it’s boiled down into syrup. Further, the article stated you would use the maple water to fully replace the water you would normally use for brewing; and that can be very expensive.