Toasting brings out the flavour in any type of nut. Heating helps release flavour compounds that make nuts taste richer and more intense.
To toast, place nuts in a single layer on a cookie sheet and bake at 350°F (180°C), stirring frequently, until lightly golden. Time will vary with type of nut. Watch carefully to prevent burning.
Toasting does not improve the flavour of stale or rancid nuts. When a recipe calls for chopped toasted nuts, the nuts should always be toasted prior to chopping. If nuts are chopped first and then toasted, the small particles of nuts are more likely to burn.