- Cold fat should be used first.
- Large chunks of meat or kidney that have remained in the fat should be cut off and chopped into small pieces, or they can be processed via a food processor or meat grinder.
- In a slow cooker, combine 1/4 cup water and the ground fat and simmer on low for 4 hours.
- Allow the fat to render for several hours, stirring often
- Then remove from heat.