Hello, if I used a dairy knife that has been unused for 24 hours to cut an onion on a dairy cutting board and then transferred the onion to a traditional ceramic slow cooker (marked for meat), have I rendered the slow cooker non-kosher?
Answer:
The maximum amount of dairy in the onion would be the size of the blade of the knife. As long as the contents of the slow cooker were 60 times the size of the blade the dairy would be nullified in the mixture, and not render the slow cooker non kosher.
