Put crispy, dehydrated seeds into your food processor and process into a finely ground meal.
Keep processing until the meal starts to release its oil and come together into a ball. This can take at least 10 minutes. You will probably need to scrape down the sides of the processor a few times to help it along. You might even need to stop the processor and let it cool down a few times.
Continue processing so the ball comes together and falls apart several times as the oils are released by the heat and friction of the processor. Add a little oil to help this process go faster, if needed.
Once the butter is smooth and creamy, mix in salt, sweetener and cinnamon or vanilla, to taste.
Store in a recycled jar in the fridge.