>>The butcher ground up some suet but somehow got red meat into it as well.
>>
>>Can I still render this? I tried it and the tallow looks more yellow than
>>usual (from the red meat?)
>
>It works ok for me. I always have some read meat in the fat when rendering.
>I do not think the yellow color comes from the meet. Is it grass fed beef?


It is possible to not have the meat affecting  the fat,  if rendered very
very slowly ( just above melting point . the fat will rise above the juices
but if rendered at high temperature,  the juices will caramelise giving a
yellowish to brownish color ( depending on the ratio of burned meats to
fat )  and an  aromatic taste ( that is very addictive and unhealthy) to the
fat .
jean-claude