You could add a bit to a few bottles to see what it tastes like. If you like it, then use it in a keg next time. Myself, I would not like adding any "flavorings" to my beer that didn't come from a natural source like hops or fruit.
I know that come fall, I will be searching for that hazelnutty flavor in a nut brown ale, but I will probably experiment to get that flavor from a choice of malts.
I like beer
Yes, he likes beer