Step 1

If using butter, oil, or seasoning ingredients, toss walnuts in the mixture until lightly coated.

Step 2

Preheat oven to 350 °F.

Step 3

Line a large, lightly colored baking sheet with parchment paper.
 Place walnuts in a single layer on the sheet.

Step 4

Toast walnuts in preheated oven for 7-10 minutes, stirring occasionally. (A little less time if they are coarsely chopped prior to roasting.)

Step 5

Heat a medium to large, non-stick dry skillet over medium-low heat.
 Add no more than 1 cup of walnuts to the skillet in a single layer.

Step 6

Toast nuts for 3-5 minutes, stirring occasionally. (A little less time if they are coarsely chopped prior to toasting.)

Step 7

Store toasted walnuts in an airtight container at room temperature for up to 1-2 weeks or in the refrigerator for up to a few months.