Unwrap the butter quarters one by one and place it in the slow cooker's ceramic pot. After all the quarters are in the pot, turn the cooker on high for about 2 hours. Do not cover all the way, keep it slightly uncovered so that when it cooks the steam doesn't stay with in.

First let it cook on high for about a couple of hours and then reduce the heat to low and let it go for another couple of hours depending on the cooker. After 3 hours just double check and see if its done.

Once it is done, let it cool down a little. Then strain it in a air tight glass jar.