I blogged a few months ago about the concentrated sangria I made. Just the other day, I strained out the last bit of ice from some concentrated Flying Dog Double Dog double pale ale.
The result is a beer concentrate of sorts, almost syrupy and with a bitterness that isn't pleasant to drink as is. But if you were to add a drop to a dram of whiskey, you'd have a sort of inverse depth charge -- a height charge, if you will, that might be enjoyed in front of a nice fire.
To be honest, the extra jolt of hoppy maltiness didn't do much for the Wild Turkey. But a half teaspoon in a dram of Powers Gold Label (for an Irish Car Dud?) gives it a touch more richness in flavor and body. Kind of like shifting the balance between malt and grain whiskies in the blend, if it were your first day in the blending room.
R: Beerjack on top, beerjacked Powers on bottom.
I count a result of "not bad" as a success in such experiments. (As a bonus, a splash of this stuff even gives ginger ale something of a kick, as a sort of inverted gaffshandy.)
I'm not sure what I'll do with the remaining 3 or so ounces of beerjack; at half a tsp per drink, I won't run out any time soon.