As a producer of maple syrup I have made lots of things with maple syrup. Most recipes the syrup will all be made into alcohol with little or no taste. It's a good way to dry out a beer. Best results was with wine but it was stabilized with sorbate and campden and then sweetened with maple syrup. I would think that if you kegged you could try something like that with beer
You can make Acerglyn (with maple syrup and Honey) or a wine, large amounts of maple syrup will be expensive.
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