Make pistachio paste: peel the pistachios from the shell. Roast the pistachios for 7-8 minutes (optional), then place them in a clean kitchen towel and shake to remove as much skin as possible.
Place the pistachios in a powerful blender and blend until smooth and creamy. This process may take 10-15 minutes (depending on your blender) so be patient.
Transfer the paste into a jar and keep it in the fridge.
Video
Notes
Roasting pistachios in the oven is an optional step. You can skip this step if you prefer.
Tip to achive greener pistachio paste, blanch and Remove the Skins: The brown outer skins of pistachios can dull the color of the paste. Blanch the pistachios by boiling them for about 30 seconds, then immediately transferring them to an ice bath. Once cooled, peel off the skins to reveal the green kernels.