blender or food processor
Substitute 3/4 cup firmly packed fresh cilantro leaves and 1/4 cup firmly packed fresh parsley leaves for the fresh basil.
Substitute 1 cup firmly packed fresh spinach leaves and 1/4 cup firmly packed fresh basil leaves (or 2 tablespoons dried basil leaves) for the 1 cup fresh basil.
Use pesto immediately because it will darken as it is exposed to the air. Or store the pesto immediately by placing in an airtight container and refrigerate up to 5 days or freeze up to 1 month.
Firmly pack basil leaves into dry meausuring cup.
Place pesto ingredients into food processor. Cover and process until smooth.