I have been experimenting with making my own cookie butter. I am looking for ideas to make the texture closer to that of the store-bought stuff, which has a texture similar to that of smooth peanut butter.
My basic recipe was 4 oz speculoos cookies (that I made), 1-2oz oil (soybean and/or coconut), 1-3 T powdered sugar.
Originally I ground the cookies in a food processor until they were about as fine as it could make them. After pulsing in the oil(s), the texture was pretty grainy. Next, I warmed a batch to make it fluid, then blended it in a blender until it was as fine as it could make it. This got me closer to the texture I was looking for, but not quite there.
I was thinking of trying a grain mill, but then I'd have to buy a grain mill. :-)
Any other ideas?