Add the cashews, nutritional yeast, and salt to a food processor or blender, and process until powdery. Make sure your machine is totally dry, so you won't introduce any moisture into the mixture.
Taste, and add up to 1/2 teaspoon more salt, as desired. Use right away, or store in an airtight jar in the fridge for up to 1 month. You can also freeze this for up to 6 months.
Notes
Nutrition information is for 1 of 6 servings; roughly 1/4 cup each. This information is automatically calculated, and is just an estimate, not a guarantee.