In the bowl of a food processor fitted with the blade attachment, grind the cookies with the brown sugar, cinnamon, and salt until fine.
With the machine running, stream in the coconut oil and mix until combined. You may need to scrape down the sides and mix again to make sure the whole mixture is combined.
Add in the vegetable shortening and mix until smooth.
Recipe by Lil' Miss Cakes at https://lilmisscakes.com/2013/speculoos-cookie-spread