Abita Brewing Co. is located about 30 miles away from New Orleans, Louisiana. Bourbon Street Barrel Aged Biere De Mars is a Biere De Garde style ale, typically brewed in March (hence the Mars name). It's aged in bourbon barrels, but I can't find much information about the barrels used.
The Biere De Garde style in the BJCP guidelines has an aroma with a prominent malty sweetness with a complex toasty character. Esters are moderate to low, and there is little or no hop aroma. There's also a musty element common in commercially brewed versions. The guidelines state that the flavor has a medium to high malt flavor with a toasty toffee or caramel sweetness. Alcohol flavors are low to moderate. Hop bitterness is medium to low, as this is a beer that should be balanced toward malt.
Abita's version pours a hazy light brown with minimal head.
The aroma is buttery, oaky, and only slightly malty.
The flavor starts malty, then turns oaky and a little buttery. There is a lingering bitterness, probably from hops, and a cola-like malt character. As much as I like the Biere De Garde and Biere De Mars styles in general, I don't care much for this example of it. It's rated at 9% alcohol, and 21 IBUs of bitterness. It seemed a bit more bitter than that.
All things considered, this is a beer I should love. I like barrel aged beers. I like Biere De Mars style in general. Abita makes some nice beers. It's got all the right elements, but somehow it just doesn't work for me. I'm giving it a 6 out of 10. Beer Advocate reviewers gave it an 89 or good rating. Rate Beer reviewers come closer to my own rating, giving it a 3.22 out of 5 on average, or 6.4 out of 10.
This is supposedly a one-time limited edition beer. If you want to see whether it's available near you today, check this link to locations selling it on BeerMenus.com.