Advice from Simo and Cicci

You can store homemade pistachio butter in the refrigerator in an airtight glass container for one month. Alternatively, you can also freeze it for up to 3 months.

Since pistachio butter will naturally have a brown-green hue, to achieve a more vibrant and lively green color, you should remove the pistachio skins after roasting by rubbing the roasted pistachios between a cloth or blanching them for a few minutes before cooking and always remove the outer skin with a cloth.