1. Toast the pistachios in a large skillet stirring occasionally until they become fragrant, then remove them and allow them to completely cool
2. Place them in a blender and roughly chop
3. Add the water, blend on low speed until it reaches a milky consistency, about 4-5 minutes, then let it rest for 30 minutes
4. Strain the liquid with cheesecloth, a fine mesh seive or a nut milk bag and weigh the liquid
5. Add the corresponding sugar by weight, a pinch of salt and the orange blossom water to the pistachio liquid and blend on low speed until the sugar is completely dissolved.

Calculating the Sugar by Weight

1. Weigh the nut milk
2. Multiply the weight by .667
3. Measure out the corresponding result
4. Example: 600 grams of liquid X .667 = 400 grams of sugar