My jalapeno porter has won a lot of awards. I add them on bottling day. Need about 9 jalapenos for a 5 gallon batch, plus or minus a couple depending how much heat you want. Chop them all up, seeds and all. Soak half the jalapenos in vodka for at least 5-6 hours, then add the vodka infusion to the beer. With the other half, remove about 3 cups of your finished beer from the fermenter and boil the jalapenos for 5-10 minutes, cool, then add that liquid to your beer as well. This provides the very best flavor AND aroma AND heat that I've come across. And it's easy to taste the beer behind the peppers because you're doing it all on bottling day, AND you can add as little or as much of the liquids as you want until it tastes just right. Sometimes I only add half the liquids, sometimes all, to get just the right level of heat and flavor. Works like a charm.