Schwarzbier

[Biergarden]

I want to try a bit of an experiment with a pretty good APA recipe I have, and that's by added 7% black patent malt to the grain bill just for the effect of making the beer black. I know 7% black patent malt is pushing the upper limits of it use, but I'm wondering if 40 IBUs would do a good enough job covering the astringency.
Any thoughts on that?

 

[LLBeanJ]

I would expect 7% black patent to result in some pretty harsh bitterness that I doubt IBUs can mitigate. Debittered black or one of the Carafa Special varieties might be a better choice if you're looking for color without the harshness.