Make sure your beef suet trimmings are cut into really small pieces, and that all of the meat bits and pieces have been removed. Your beef suet chunks should be as pure and white as possible. Also, a meat grinder or food processor is a great way to get really little bits. Just make sure your chunks of fat are frozen so that they break down in the grinder easier.
Put your beef suet fat trimmings into a large, thick, good quality stock pot. Place it on low heat. Set it at the lowest possible setting! High heat will cook whatever meat bits are attached and give your suet a meaty taste which can be off-putting.
Break down the beef suet fat trimmings as much as possible in the pot.
The animal fats will slowly start heating up and you will notice the rendering process beginning to start as the liquid fat begins to come out. Make sure to stir your lard as much as possible to keep it from burning or starting to brown too much.
Slowly the solid fat will start breaking down more and more until the fat trimmings are tiny little chunks.
Once the rendered fat starts showing signs of getting browner or having more of a “beefy” aroma, your lard is probably done and ready to be filtered.
Line a large fine mesh strainer with a few layers of cheesecloth (anywhere from 2-4). Put this on top of a large glass bowl to catch the lard when it comes through (a coffee filter or paper towel will also work).
Gently pour all of the fat trimmings and lard through the cheesecloth lined strainer into the large bowl. Spread the fat trimmings out in your cheesecloth lined strainer, and push down on the fat with a large spoon to get as much of the lard through as possible. Let it sit and drain for at least 10 to 15 minutes or until the dripping starts to slow down or stop.
Remove the strainer and pour your liquid lard into a mason jar. Let it cool, uncovered, for a few hours or until the lard hardens up and becomes a lot lighter in colour. At this point you can seal the lard and keep it in the fridge. You can also keep it on the counter but if you do, make sure to use it up quickly.
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Notes
Above in the blog post I provide recipe ingredient substitutions as well as recipe variations.