Add all ingredients to a high-speed blender and process until smooth, stopping to scrape down the sides as necessary. (See Notes if you don’t have a high-speed blender.)
Transfer to a jar and store covered in the fridge.
Notes
If You Don’t Have a High-Speed Blender: You can easily soften the nuts to help them blend well. To do so, boil the pistachios for 1 minute, or soak them in hot water for 20 minutes or cold water in the fridge for 24 hours, and then use a food processor or regular blender.
Whole Milk: Instead of using whole milk, you can use 1/2 cup boiling water + 2 tablespoons whole milk powder instead.
If You Don’t Want Flecks of Pistachio Skin: Peel the pistachios! To do so, boil them for 1 minute, drain them, and then spread them out onto a baking tray lined with a kitchen towel. Place another towel on top, and rub the towel on the pistachios. Discard the peels, and hand-peel any stubborn nuts.
If White Chocolate Isn’t Your Thing: You can make this with milk or dark chocolate instead.
Recipe Yield and Serving Size: This recipe makes about 2 cups of pistachio cream, or 16 (2-tablespoon) servings.
Storage: Store this in a lidded glass jar in the fridge for up to 1 week.