Tallow soap: the recipe, the production of tallow and why your grandmother knew it
TL;DR: Tallow soap made from beef fat is hard, durable (2-3 years) and contains fatty acids very similar to human sebum - ideal for sensitive skin. Tallow is cheap to find in butcher shops, can be remelted at home, and soap is made using the standard cold process method.
There is a raw material that has been used in soap making for thousands of years, disappeared from the scene with the advent of industrial vegetable oils, and is now making a comeback - this time with a scientific rationale. Beef tallow is the animal fat that was used to make soap in every village a hundred years ago. Today, it's being rediscovered by people looking for simple, pure ingredients and soap with exceptional skin properties.
This page will show you how to obtain tallow, how to render it into pure form, why tallow soap works so well — and how to make it.
Where to get beef tallow and how to choose it?
Beef tallow is a waste product from butcher shops available at a fraction of the price of cut meat. The best quality comes from farming where cattle is pasture-raised.
Tallow is rendered fat from a mammal — most commonly from beef (beef tallow) or sheep (mutton tallow). It is a raw material, not a by-product - fresh suet is solid, light-coloured fat taken from the area around the kidneys or from the back. It is called "leaf fat“ or "kidney fat“ and is considered to be of the highest quality.
Butcher shops is the easiest source. Beef tallow is a waste raw material for butchers - many give it away or sell it for a nominal price (10-30 CZK/kg). Simply call your local butcher or abattoir and ask for "beef tallow“ or "beef fat“.
Tip: Tallow from farm butchers selling organic or pasture-raised beef tends to be of higher quality - grass-fed animals have a higher proportion of omega-3 fatty acids and vitamin K2 in their fat.
Organic farms and farm sales — direct sale of raw tallow when purchasing meat. Farmers at local markets or through farmers' e-shops.
E-shops focused on the paleo/carnivore community — purified beef tallow in jars, ready to use. More expensive (200–400 CZK/kg), but saves rendering work.
How to render tallow at home — rendering
Rendering is the process by which you get pure, light fat: the crude tallow is rendered and the water and proteins are removed. There are two methods - wet rendering (with water, safer) and dry rendering (without water, faster). Both give the same result.
Method 1: Wet rendering (with water, recommended)
What you will need:
- Raw tallow (cut or ground into smaller pieces)
- Large pot or slow cooker
- Water (same amount as tallow)
- Fine sieve or cheesecloth
- Glass or stainless steel containers for storage
Procedure:
- Cut the tallow into small pieces (ideally 2–3 cm), or have it ground in a meat grinder — the finer, the more efficient the rendering.
- Place in the pot, add the same amount of water.
- Heat on low flame (approx. 80–90°C) — it must not boil vigorously.
- Stir every 30 minutes. After 2-3 hours the proteins and tissues are "fried" (cracklings or grieven).
- Strain through a sieve or cheesecloth into a container. Let cool.
- In the refrigerator the fat solidifies on top, water remains below — separate the fat.
- Render the fat once more (without water, at low temperature for 30–40 minutes) to completely remove moisture.
The resulting tallow should be white or light yellow and odorless. If it has a slight beefy smell, render it once more.
Method 2: Dry rendering (without water)
Tallow is melted directly without water — faster, but requires careful temperature monitoring to avoid scorching. Suitable for more experienced makers.
Procedure: Place cut tallow in the pot without water. Heat on very low flame (60–70°C) while stirring constantly until the fat is completely melted and the dry tissue turns golden. Strain and let solidify.
Storage of rendered tallow
Clean tallow can be stored:
- In the refrigerator: 3–6 months
- In the freezer: 12–24 months
- At room temperature in a well-sealed container: 4–8 weeks
Why is tallow soap so exceptional for skin?
Beef tallow contains fatty acids very similar to human skin sebum — theoretically it should be more natural and less irritating. It also creates hard, durable soap with thick creamy lather.
Fatty acid composition and biocompatibility
Beef tallow has a unique fatty acid composition:
| Fatty acid | % in tallow | % in skin sebum |
|---|---|---|
| Palmitic acid (C16:0) | 25–30% | 22–25% |
| Stearic acid (C18:0) | 20–25% | 5–8% |
| Oleic acid (C18:1) | 37–43% | 25–30% |
| Palmitoleic acid (C16:1) | 3–5% | 10–20% |
Tallow composition is strikingly similar to the composition of human skin sebum (sebum). This biocompatibility is a key argument of tallow soap proponents: "soap made from a substance that is natural to the skin should irritate it less;
Scientific studies directly comparing tallow and vegetable soap on skin are limited - most of the evidence is anecdotal. But there is solid research on the biocompatibility of fatty acids from animal fats with human skin in general.
Stearic acid and hardness
Sodium stearate is hard and stable. Soap with a high stearic acid content - whether from tallow, cocoa butter or shea butter - is hard, durable and produces a creamy, thick lather.
Vitamins A and D in pasture-raised tallow
Tallow from grass-fed cattle contains a higher proportion of vitamins A, D and K2 than that from factory-farmed cattle. Some of the vitamins survive saponification in the unsaponified fraction. The amount is small but contributes to the "nutritional value“of tallow soap.
How to make tallow soap — two recipes
Tallow soap is made using the standard cold process method. Two options: 100% tallow (simplest, most durable) or a combination with coconut and olive oil (balanced properties, better lather).
Overview
| Yield | ~900 g |
|---|---|
| Difficulty | Low to medium |
| Curing | 4–6 weeks |
| Shelf life | 2–3 years |
Version 1: 100% tallow soap (minimal ingredients)
This recipe is the closest to historical soap — just two ingredients. Popular in the ancestral/carnivore community.
Ingredients:
- 700 g rendered beef tallow
- 93.1 g NaOH
- 260 g distilled or boiled water
- Super fat 5%
Calculation: Saponification number of tallow = 0.140. For 700 g: 700 × 0.140 = 98 g NaOH for 0% SF. With 5% SF: 98 × 0.95 = 93.1 g NaOH.
Procedure: Standard cold process. Melt the tallow (solid at room temperature, melting point ~42-45 °C). Temper to 35-40 °C. Mix with leaching solution. 100% tallow soap reaches trace relatively slowly - allow 10-20 minutes with a stick blender.
Result: white or cream soap with a gentle creamy lather. Very durable (due to the high content of saturated fatty acids and natural antioxidants).
Version 2: Tallow soap with coconut and olive oil (balanced variant)
Combines the benefits of tallow (hardness, conditioning) with coconut oil (lather) and olive oil (gentleness).
Ingredients:
- 350 g rendered beef tallow (50%)
- 210 g coconut oil (30%)
- 140 g olive oil (20%)
- 99,9 g NaOH
- 260 g water
- Super fat 5%
NaOH calculation:
- Tallow (SAP 0.140): 350 × 0.140 = 49.0 g
- Coconut (SAP 0.178): 210 × 0.178 = 37.4 g
- Olive (SAP 0.134): 140 × 0.134 = 18.8 g
- Total 0% SF: 105.2 g NaOH
- With 5% SF: 105.2 × 0.95 = 99.9 g NaOH
Additives (optional):
- 14–21 g essential oil
- Natural colorants (no additives — leave the soap naturally cream-colored)
Result: Excellent lathering, hard and durable soap. Ideal as a daily soap for body and hands.
Tallow vs. palm oil — what are the differences?
Both raw materials are used for soap hardness, but tallow provides better hardness and conditioning. Moreover, it is a local waste with no ecological impact, whereas palm oil requires destructive agro-industrial production.
| Palmitic acid (hardness) | 25–30% | 40–48% |
|---|---|---|
| Stearic acid (hardness) | 20–25% | 3–6% |
| Oleic acid (conditioning) | 37–43% | 36–40% |
Tallow provides more stearic acid (extra hardness and durability) and more oleic acid (conditioning). Palm oil has more palmitic acid and creates slightly more lather.
From an ethical and ecological point of view: the tallow from the local butchery is a local waste raw material with zero transport footprint and no impact on the forests. For those who want palm-free soap without compromising on quality, tallow is a natural choice.
Frequently asked questions
Will tallow soap smell like beef? Properly rendered tallow has virtually no odor. Finished soap smells of the added essential oil, not tallow. If the tallow smells, rendering was insufficient — repeat the process.
How long does tallow rendering take? Wet rendering (with water) takes 2–3 hours on low heat plus cooling. Dry rendering (without water) is half an hour to an hour faster, but requires more careful temperature monitoring.
Can I use pork lard instead of beef tallow? Yes, lard works similarly to tallow in soap. Lard has a little more oleic acid - the resulting soap is a little softer. Combine with coconut for hardness.
How long does tallow soap last? Thanks to the natural stability of saturated fatty acids, tallow soap lasts 2–3 years when properly stored (dry, dark place). It is one of the most durable homemade soaps.
How does 100% tallow soap differ from combinations with oils? 100% tallow soap is hard, durable and minimalistic (just two ingredients), but reaches trace more slowly. Combination with coconut and olive oil lathers better and is more practical for daily use.
Why is interest in tallow soap returning? It's part of a trend back to simple, traditional products. Tallow has been used for thousands of years without negative skin consequences - for people with sensitive or eczematous skin, it's often the first thing that really helped.
See also:
- Special soaps — salt, beer and other unconventional recipes
- Oil and fat encyclopedia — comparison of all fat components
- Recipes for beginners — if this is your first recipe
- Suppliers in the Czech Republic and EU — where to buy rendered tallow ready for soap
⚠️ Recipe disclaimer
This recipe was created or revised with the help of artificial intelligence tools and has undergone NaOH gram recalculation. Nevertheless, we recommend verifying lye amounts in an independent calculator (e.g. SoapCalc or Brambleberry). Working with sodium hydroxide requires protective equipment — see Lye safety. Information is for educational purposes; the manufacturer is not liable for damages resulting from their use.
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