Yeah, you need to mix the coffee and oil so fast they emulsify, otherwise they don't play well together. Stirring with a spoon just doesn't cut it. I have one of those small blenders that also doubles as a bottle, the blender blades doubling as the cap. Works well together. Just gotta watch out for the steam from the coffee building up pressure. I forgot to mention earlier that I'm also partial to nutmeg and/or cloves in my coffee in the autumn and winter time. Haven't tried allspice or cardamom, personally, but I'm going to try some when the weather gets cooler.