As Rick mentioned, a few grains is all it takes just trying out my itself. I like WW's recipe for a rub. Just remember the math. Cayenne is 30,000 SHUs and Bhut Jolokia is 1,000,000 which means it is about 33 times hotter. That puts it at about 1/10 of 1 teaspoon to match the heat in that recipe. Blackened salmon is a big deal and if you like that kind of thing, it will be good. It would be killer on swordfish. Either way, the smoked bhut would be good in this application. Tom