Spread nuts on a large, rimmed cookie sheet, and bake at 350F for 10-15 minutes, or until lightly golden and fragrant.
In a large bowl, stir together the melted butter, rosemary, cayenne, brown sugar, and salt.
When the nuts are done roasting, add them to the bowl and toss well to evenly coat with the mixture.
Spread them back on the sheet and bake for 5 more minutes.
Serve warm, but can be stored in an airtight container and re-warmed when you're ready to serve.
*The original recipe calls for 16 oz. of nuts, but volume and weight aren't always equal forms of measurement. I found 3 cups to be a happy medium, but you could also weigh 16 oz.
**Start with 1/4 teaspoon of cayenne and add the extra to taste if you want them more spicy. Not all cayennes are created equal. 1/4 teaspoon was perfect for me.