Yes, blanching basil before making pesto can help preserve its vibrant green color and prevent it from oxidizing quickly. It also mellows the flavor slightly.
Blanching involves briefly immersing the basil leaves in boiling water, then immediately transferring them to an ice bath to stop the cooking process. Here's a step-by-step guide:
Bring a pot of water to a rolling boil.
Prepare an ice bath by filling a bowl with ice and water.
Gently submerge the basil leaves in the boiling water for about 15-30 seconds. The exact time depends on the quantity and size of the leaves.
Immediately remove the basil leaves from the boiling water using a slotted spoon or tongs and transfer them to the ice bath.
Let the basil leaves cool completely in the ice bath, which usually takes a minute or two.
Remove the basil leaves from the ice bath and thoroughly dry them. Excess water can dilute the pesto and affect its texture.
Proceed with your pesto recipe, using the blanched and dried basil.
Ensure the basil leaves are completely dry before blending them into pesto. Excess moisture can lead to a watery pesto and affect its shelf life. Pat them dry with paper towels or use a salad spinner.