Preheat oven to 350°.
Put 2 lbs. assorted unsalted nuts on a large baking sheet. Toast in the oven until golden, about 10 minutes. Remove from oven.
4 Tbsp coarsely chopped fresh rosemary
1 tsp ground cayenne
4 tsp brown sugar
4 tsp coarse salt
2 Tbsp melted unsalted butter
Toss nuts with spiced butter mixture. Serve warm.