Haven't tried it, but here is a crack at the recipe. Without really detailed info from the brewery the best I can do is get you in the neighborhood, once you brew it you'll be able to tweak the recipe to get closer to the original.
It is 6.5% ABV, so the OG will be around 1.065.
Odds are that most of the grist is pale malt (it is for most brown ales). Then ~.5 lbs of chocolate malt which will give you a nice brown color without making the beer too roasty and porter/stout like. Finally .5 lbs of medium crystal malt (for caramel sweetness) and .5 lbs of dark crystal (reviews mention burnt sugar and berries).
Just adjust the pale malt to hit the gravity based on your efficiency (or use pale extract if that is how you brew).
Hop with enough Saaz (or whatever variety you want) near the start of the 90 min boil to get to ~25 IBUS. Toss in ~.5 oz of Saaz near the end of the boil for a bit of spicy aroma.
I'd ferment with a clean American ale yeast (WLP001, WY1056, or US-05), although pretty much any clean ale strain would make a fine beer.