TOAST NUTS TO INTENSIFY THEIR FLAVOR – Toasting nuts before using them in recipes intensifies their flavor. To toast nuts, place them in a dry skillet over medium heat. Shake the pan often, and toast for four or five minutes until fragrant. Cool before using. Because nuts have a high fat content, they go rancid quickly. The best way to store shelled nuts is in an airtight container in the refrigerator where they’ll keep for about four months.