Add the 3 cups raw pistachios into a high-powered blender and process for 5 minutes.
Next, add the ¼ cup avocado oil, ⅓ cup powdered sugar, 1½ tablespoons Tahini paste, and ½ teaspoon salt.
Continue to process for another 15-20 minutes.
Every 5 minutes or so, you can open the blender and scrape down the pistachios on the side of the blender.
Keep blending until you get a smooth paste or cream texture. Don't worry it will happen. You do not need to add more oil.
Transfer the pistachio cream into a large jar or two small jars. Use as needed or store in the fridge * see notes.
Video
Notes
Serving size: 2 tablespoons
Makes a total of 2 and 1/4 cups.
I stored mine in an 18-ounce jar.
Pistachios: If you want to use what you have on hand like roasted pistachios, it will also work. The taste and color will vary slightly. If you are going to use salted pistachios, do not add any more salt. Also, most pistachios will have skin on them, if you want to keep it on that's fine, but the pistachio cream will have a darker color from the skin of the pistachios.
Storing: I had these on my counter for 2 weeks once, and they held up well. If you are more comfortable storing them in the fridge, you can. Treat them like you would any other nut butter which typically has a long shelf life.
You may see some people making this with powdered milk or white chocolate. I do not feel like there is a need for this or the added calories. Up to you.