I really enjoy the complexity that high-ABV brews can have, and especially the complexity that can flourish if properly aged. Haven't had the BA Sidamo yet but I will have to make a point of it if I can find some that hasn't been sitting out too long.
Also had the good fortune of Cyniclone's recommendation appearing on the tap list at my local establishment today. Too good of an opportunity to pass up.
Prairie - Birthday Bomb!
Color: Very dark brown, basically black against a neutral white background. Head wasn't strong, but the head isn't what I came for.
Nose: If you want an imperial stout with a complex nose, this is the beer for you. Sweet malt, caramel, strong coffee, some roasted malt, some cinnamon, and just a touch of that heat spice from the chiles. Smells sweet and rich and just a bit toasty, kinda bridging the gap between malt-forward imperial stout and sweet dessert beer (dessert beer as in Southern Tier's Blackwater series comes to mind).
Taste: Hits a lot of the same notes. Sweet malt, caramel, coffee, some roasted malt, and a touch of vanilla. There was probably some of those chiles in there too, but I'm not enough in tune to read it all. I think the difference between the standard Prairie Bomb! and the Birthday iteration is the caramel note. This is definitely a sweet beer, but not the sweetest dark beer (stout, porter, or otherwise) that I have had. There's a subtle hop character that keeps the sweetness at bay, but it stays in the background where it belongs. That touch of heat spice from the chiles also works to chip away at the sweetness. I got a growler fill, so the beer was sitting exposed to air for about an hour while I was consuming it. Over time, the chiles heat spice became more apparent. Very complex, very interesting.
Mouthfeel: Fairly heavy, just a touch creamy. Very warming as well on account of the ABV (13%) and that touch of heat spice.
Finish: Definitely a coffee-forward finish. Bit of booziness there too, pretty much the only time it was apparent. Then comes the roasted malt, some sweet malt, that touch of chiles spice, and an interesting bit of lingering bitterness that bounces back and forth between subtle hop bitterness and heat spice.
I remember sampling this beer before but not committing to the growler fill. It ended up selling out within a few days. I am glad that I had the chance to correct that mistake when it came back on this time. WOW.