How to Render Tallow

Katie Wells Avatar

Reading Time: 4 minutes

This post contains affiliate links.

Read my affiliate policy.

How to render tallow at home for cooking and soap making
Wellness Mama » Blog » Recipes » How to Render Tallow
Note from Katie: Please welcome my friend Elizabeth (also a mom of five) to share her tutorial for how to render tallow (beef fat) at home. If you missed it, also check out her recipe for solid shampoo (shampoo bar soap). Enter Elizabeth…

What is Tallow?

The first time we bought a share in a cow that was being butchered I was asked if I wanted any of the fat. I was a little taken aback by this question, I will admit, but was advised that because my husband is a deer hunter, we could use the fat to grind in with our venison to make it a little less lean. (It is a bit difficult to not burn such lean meat.) So I accepted.

Then I got into soap making and realized the gold mine I had in my freezer in the way of soaping oils. But how do you take beef fat and turn it into soap?

I began to research rendering the fat and realized it is quite a simple process!

TIP: I have since also been able to obtain amounts of fat from a local butcher at no charge. They were quite happy to give me bags of fat left over from the butchering process. I just needed to ask!

Tallow for Soap Making

Don’t be scared away by the thought of using beef tallow in your soap recipes. Beef tallow is a great oil for soaping and makes a nice hard bar with a rich lather. In fact, most soap bought commercially is made with tallow. Check the ingredients for sodium tallowate, which is a fancy way of saying saponified tallow.

The “sodium” comes from sodium hydroxide (lye) and the “tallowate” is the tallow. There is also no need to worry about your soap smelling like a pot roast! The chemical reaction that takes place completely changes the scent and you will be left with a normal smelling bar of homemade soap. 🙂

In home soap making, tallow is commonly used in laundry bars and can be used in the place of palm oil in soap recipes, as the properties of the two oils give the same results in a soap bar.

I use it for my solid shampoo recipe. It is best to use the “leaf fat” with is located around the kidneys. It has a milder taste and smell than other fat. I used what I was given so it came from all parts of the cow, however, I did learn that the “drier” fat was much better than the more gelatinous looking fat. That may not make sense now but it will when you start working with it.

Next time I will only use the drier, stiffer fat. Tallow can also be used in the place of shortening or vegetable oil as a healthier alternative in cooking or frying. In this case, I would be sure to use leaf fat. Because I was just making soap, I wasn’t picky.

How to Render Tallow

Rendering tallow isn’t difficult, as long as you have a few supplies on hand to expedite the process.

Tallow Rendering Supplies Needed:

  • Beef fat (ask a local farmer or butcher for any extra or buy from a reputable source)
  • Slow cooker
  • Meat grinder or food processor
  • Cheesecloth
  • Molds or jars to store it in

It is much easier to work with cold fat, so make sure yours has been in the refrigerator before beginning. Determine how much can fit in your slow-cooker and trim off any remaining meat and gristle. You don’t have to get every last bit of meat but get as much as you can. The rest will cook out later.

Now you can run it through your meat grinder. If you don’t have one, you can cut it into smaller hunks and pulse it in your food processor until it resembles ground beef. It will heat faster and more evenly like this.

Once you have done this, put the ground fat in your slow-cooker and turn it on low. You want it to heat slowly so it will not burn. Now, the first time I did this, I did it inside. The second time, (with fat from a different cow) I had to do it outside because it was stinky. I was also pregnant so I am sure that didn’t help! 🙂

I think it will depend on the cow and the type of fat you use, whether it is the leaf fat or just any beef fat. Don’t be afraid of the smell, but be prepared to move it outside if it isn’t appealing to you 🙂 And remember, the smell will NOT affect the smell of your soap bar.

Now you wait 🙂

It will slowly start to melt and this is where the leftover “extras” you weren’t able to cut out will begin to float to the top. When the floating bits become crispy and all the fat is liquid, it is finished. This takes about 6 hours, more or less depending on how much you are doing.

When it is finished you can scoop out the crispy floaties and then pour the tallow through your cheesecloth. There are a few ways you can store it. I store mine in clean glass jars leftover from pasta sauce, salsa, etc and then store it in the freezer.

You can also line a baking sheet or dish like a 9” x 13” glass pan with parchment or wax paper, pour the tallow in that and let it solidify in the refrigerator. Once it has hardened lift it out and break it up a bit like brittle. Now you can put it in a freezer bag and store it in the freezer. This is definitely helpful if you are going to cook with it because you can pull out smaller amounts at a time.

I store mine in the deep freezer because I may go months without making soap. Then I am able to pull it out as I need it. I have stored small amounts in the fridge for frying as well and this has lasted several months. If you do a good job straining all the crispies out it should last quite a while.

If you aren’t sure if it is still good, use your nose and your eyes. When mine finally did go bad it had a small spot of mold and an “off” smell. But this was easily 6 months after the rendering process.

See how simple the process is? I have never rendered lard (fat from a pig) but I can imagine the process would be the same.

Now you are ready to begin soaping or cooking with your homemade tallow. It’s also great in homemade skincare products.

Have you ever tried to rendered tallow before? How did it go?

Katie Wells Avatar

About Katie Wells

Katie Wells, CTNC, MCHC, Founder of Wellness Mama and Co-founder of Wellnesse, has a background in research, journalism, and nutrition. As a mom of six, she turned to research and took health into her own hands to find answers to her health problems. WellnessMama.com is the culmination of her thousands of hours of research and all posts are medically reviewed and verified by the Wellness Mama research team. Katie is also the author of the bestselling books The Wellness Mama Cookbook and The Wellness Mama 5-Step Lifestyle Detox.


47 responses to “How to Render Tallow”

  1. Amelia Avatar

    Is saponified tallow the same as rendered tallow? In all the soap recipes I’ve read they ask for saponified tallow but I thought you had to do something with sodium hydroxide for that. Thanks!

    1. Jamie Larrison Avatar

      Without seeing the recipes in question it’s hard to say. Saponified tallow is tallow that’s been used in soap with lye and it’s gone through a chemical change to turn it (and the other fats) into soap. Rendered tallow is the fat that’s been melted off of animal bones, it hasn’t been chemically altered into soap.

  2. Bee Avatar

    Katie, My grandmother taught me to render fat a different way. She would half fill a large pot with water and add the fat and boil the water until the fat melted. Then would turn off the heat and let it cool, sometimes placing it outdoors in the winter or just on the counter until it was cool enough to refrigerate. As fat is lighter than water once the pot was cold she would skim off the fat. The meat pieces were heavier and would sink to the bottom. She might do it again with the same fat, different water, until she felt the fat was nice and clean. There was no need to strain the fat.

  3. Lisa F Avatar

    For soap, I rendered both generic fat that came with side of beef (a friend gave it to me) and the leaf fat I bought from a local butcher. Big difference! Leaf fat from around the kidneys is a cylinder of waxy pure fat. There is almost no scent even when heated up in crock pot. I was able to get much more usable tallow. In combo with olive and coconut oil, it makes a beautiful soap that feels silky on the skin (6% superfat).

  4. Rockey Ana Avatar
    Rockey Ana

    Do you have any opinions on using bacon grease to form a tallow? I have read a couple of articles on using the bacon grease. I am just curious why it was beef you were interested in.

  5. Leslie Avatar

    I use my roaster oven and set it outside. Crockpot, good idea for smaller amounts! Works great! I just ladle out the purified liquid fat into containers as it renders! So easy! I takes several days.

Leave a Reply

Your email address will not be published. Required fields are marked *