Add all of the ingredients to a blender or food processor and pulse to break down the tiger nuts. Once the tiger nuts begin breaking down, blend on high until you achieve the desired consistency. You may need to pause the process a few times to scrape little pieces of tiger nut from the sides of the blender down with a rubber spatula.
Transfer the tiger nut butter to an airtight container (like a small jar or food storage tin) and refrigerate for up to 10 days. Use it just like you would any other nut butter: spread on toast, drizzle over fruit or granola, or use it in baking recipes.