Rendering tallow for skin means melting the fat out of raw beef suet at low heat and getting everything that isn't fat back out of it: water, protein, blood, tissue. Two methods do it. A wet render simmers the fat with water and salt, so the water-soluble junk leaves with the water: the mildest fat, the most work. A dry render melts the fat alone with no water, which is faster, smells more, and scorches if you look away. A fat destined for skin usually wants both, in that order.
I don't render for Craft, and I'll say that plainly before I say anything else. I've rendered plenty at home, and what I learned doing it badly is most of what's useful here.
If you'd rather skip all of it, Bare Silk ($34) is the finished version: five ingredients, poured dense, on suet rendered by people who do it every week.
Start with suet, not trim
The fat you start with decides most of the outcome, and the two words that matter are suet and trim.
Suet is the hard, crumbly fat packed around the kidneys, inside the body cavity. It sits deep, so it gets handled less and warms less before it reaches a kettle, and it runs high in stearic and palmitic acid, so it renders firm and smells mild. Trim is what comes off the outside of the cuts: fat cap, edges, scraps. It carries more residual protein and blood, more surface area and a softer, more variable profile, and it renders darker and beefier. Most cheap tallow is trim, and most trim gets bleached and deodorized afterward to hide what the render brought along.
Ask your butcher for suet or leaf fat, and expect to pay more. Suet, not trim is the long version, with the anatomy and the numbers.
Wet rendering: what it does and what it costs you
A wet render simmers chopped suet with water and a little salt. Two things happen at once: the fat melts out and floats, and the proteins, blood and water-soluble odor compounds dissolve into the water underneath. Chill the pot and the fat sets into a disc you lift straight off, leaving the murky water behind.
What you get is a paler, milder fat than any other method gives you. What it costs is time. Each wash is a simmer, a chill and a scrape, and if you want it cleaner you do it again. The real risk isn't the tedium, it's the water: moisture left in the finished fat is a place for microbes to live, and a jar of tallow with water hiding in it will grow something. That's why the last step of a wet render is always a dry one.
Dry rendering: faster, louder, easier to ruin
A dry render melts the fat alone over low heat, no water added. The moisture cooks off, the solids sink and brown, and the clear fat is strained off the top. It's faster, needs less equipment, and drives off the last of the water on its own.
It also has a temper. Dry heat browns protein, and browned protein is flavor: this is how you'd render tallow for cooking, and why grocery-store tallow smells like dinner. Push the temperature and you scorch the fat, which darkens it and starts oxidation early. Keep it low and you get a clean, faintly nutty fat. The margin between those outcomes is about twenty degrees and one distracted hour.
Wet render vs dry render, side by side
| Wet render | Dry render | |
|---|---|---|
| Method | Simmer the fat with water and salt, chill, lift the disc | Melt the fat alone at low heat, strain off the solids |
| What it removes | Water-soluble protein, blood, odor compounds | Moisture and the solids that sink |
| Color | Pale cream to near white | Cream to light gold, darker if it ran hot |
| Smell | Mild, faintly of warm oil | More character; beefy if it browned |
| Time | Longest; each wash adds a chill cycle | Two to four hours, one pot |
| Main risk | Water left in the finished fat | Scorching, which darkens it and ages it early |
| Best for | Skincare, where smell and shelf life matter | Cooking, or as the finishing step after a wash |
How to render tallow for skin at home, by weight
Weights, not guesses. This makes roughly 700 to 800 g of tallow, which is enough for a dozen jars of balm with some left over.
- Start with 1 kg (2.2 lb) of raw suet. Cut away any meat, membrane or blood spots, then grind or chop it as small as your patience allows: smaller pieces render faster and cooler, which is the whole game. Freezing it for an hour makes chopping far easier.
- Wet step. Put the suet in a heavy pot with about 500 ml of water and roughly 15 g of salt (a tablespoon). Hold it just below a simmer, 85 to 95 C (185 to 205 F), for two to three hours, stirring now and then. It should barely move. A rolling boil emulsifies the water into the fat and undoes the point of the exercise.
- Strain and chill. Pour it through a fine sieve lined with cheesecloth into a bowl. Refrigerate until the fat has set into a hard disc, usually overnight. Lift the disc off, tip out the gray water underneath, and scrape the soft, cloudy layer off the bottom of the disc with a spoon. That layer is what you were trying to lose.
- Wash again if it needs it. If the underside still reads gray or the fat still smells strong, repeat step two with fresh water. How many times depends on your fat, not on a number somebody put in a recipe.
- Dry finish. Melt the clean fat on its own, uncovered, at about 100 C (212 F). It'll fizz and crackle while there's still water in it. When the fizzing stops and the surface goes glassy and still, the water's gone. That usually takes twenty to forty minutes. Don't let it brown.
- Strain hot, cool fast. Pour it through fresh cheesecloth into clean, dry jars while it's liquid. Lid on, then into the fridge for twenty minutes so the whole jar crosses its setting range at once. Cool it slowly on a counter and it sets grainy, which is fat crystals, not a fault.
Two things ruin more home batches than anything else: heat and water. Keep the heat low enough that the fat never browns, and get every drop of water out before it's jarred.
How to tell your tallow is clean
Four tests, no equipment.
Color. Solid, it should be pale cream to soft white, even all the way through. Liquid, it should be clear gold with nothing floating and no cloudiness. Cloudy liquid fat means water or fine solids are still in there.
Smell. Warm a little on the back of your hand. Clean tallow smells faintly of warm oil, and a little like butter. If it smells like a steakhouse, it was trim, or it ran too hot, or both.
No crackle. Heat a spoonful. If it spits, pops or fizzes, there's water in it and it isn't shelf stable yet. Silence means done.
Texture. Set fast, it should be smooth and firm, with no gritty patches and no watery pockets. A wet pocket means start that jar over.
Storing rendered tallow
Clean, dry, water-free tallow is stable at room temperature. On a cool dark shelf in an airtight jar, expect months. In the fridge, longer. In the freezer, a year and more, and it thaws with no change in texture. Glass beats plastic, small jars beat one big one because you open them less, and a dry spoon beats a wet finger. Oxygen is what ages it, so keep the headspace small and the lid on.
Rancid fat announces itself: stale nuts, old crayons, an oil bottle left open too long. Your nose beats any date on a lid. A gram of vitamin E per kilo of fat buys real time, and it's the one addition worth making before you store it.
What we ask of ours
We don't render. We buy the fat and specify how it's handled, which is a different kind of control and worth saying plainly.
The suet is 100% kidney fat from grass-fed and grass-finished cattle on Montana family ranches, bought direct rather than through a broker, so nobody in the middle gets to decide what "beef fat" means that week. It's rendered low and slow, in wet and dry steps, by our Montana render partner. Nobody bleaches it and nobody deodorizes it, which are the two industrial steps that make a cheap fat look and smell like nothing. What comes out is pale cream and smells faintly of warm oil, and that faint smell is the honest cost of skipping the deodorizer. Blending happens in small batches in the Mountain West. Finished jars are checked and shipped from Cottonwood Heights, Utah.
You'll see brands advertise a specific number of washes as proof. I'd rather give you the standard than a count, because the count depends on the fat that showed up that week.
From rendered tallow to a balm
Rendered tallow on its own is stiff and drags on skin. A balm is roughly four parts tallow to one part liquid carrier oil by weight, plus an antioxidant and whatever botanicals you want, cooled fast so it sets smooth. How to make tallow balm at home has the full recipe in grams, both the dense method and the fluffy one, and the cooling step that keeps either one silky.
If you want to blend without rendering or weighing, that's what the Craft Tallow Kit ($110) is for: five tallow bases already rendered and portioned, five vials holding the measured botanicals for one jar each, a warming plate, a pipette and the recipe deck. It's sold out at the moment and ships in about three weeks on pre-order.
Which jar, if you'd rather not render
Bare Silk ($34) is the one where the fat has nowhere to hide: suet tallow, meadowfoam, jojoba, arrowroot and vitamin E, unscented, so what you smell in the first minute is the render itself. The rest of the line sits in the balm collection, and beef tallow for skin: the complete guide is the place to start if you're new to any of this.
Not sure which jar? The two-minute quiz at find your balm sorts it. If you'd rather just start, Bare Silk ($34) is the one I hand people first, and every jar carries sixty days on your skin to disagree with me.
Questions we hear
Can I use cooking tallow on my skin?
Yes, if it's clean, unsalted and has nothing added. It'll work as an emollient, because it's the same fat. Two catches: cooking tallow is usually rendered from trim at higher heat, so it smells more like dinner than you'll want on your face, and salted or seasoned tallow will sting broken skin. Skincare tallow is rendered gentler and from suet for exactly those reasons.
Do I need to render tallow multiple times?
Only until it's clean. One good wet wash plus a dry finish is enough for a mild suet; a beefy or bloody fat may want two or three washes. Judge it by the underside of the chilled disc and by smell, not by a number in a recipe.
Why does my rendered tallow smell beefy?
Three usual causes: it was trim rather than suet, it ran too hot and the proteins browned, or a wet wash was skipped. Rendering low and wet fixes the first two on the next batch. The one that's already made is fine for cooking. Will it smell like beef? covers what a properly rendered fat smells like on skin.
Should I deodorize tallow?
Industrial deodorizing pushes steam through fat at high heat to strip out the volatile compounds. It works, and it takes the carotenoids and tocopherols with it, which is why deodorized fat is flat white and has nothing to say. We don't do it. At home the equivalent is more salt-water washes, a gentler road to the same quieter fat.
Wet render or dry render for skincare?
Wet first, dry last. The wet step pulls out what makes fat smell and spoil; the dry step drives off the water it left behind. Dry alone is faster but keeps more beefy character. Wet alone leaves moisture in the jar, and moisture is what lets something grow in a fat that otherwise can't.
How much tallow does a pound of suet make?
Roughly 70 to 80% by weight, so a pound of raw suet gives around 11 to 13 oz of finished tallow. The rest is water, membrane and cracklings, and trim yields less.
Can I render tallow in a slow cooker?
Yes, and it's the easiest way to keep the heat low. Set it to low, chop the suet small, and leave the lid off or cracked for the dry finish so moisture can leave. A pressure cooker is the wrong tool: it traps the water you're trying to lose.
Go deeper
Suet, not trim explains why the cut of fat decides the jar. How to make tallow balm at home takes rendered tallow the rest of the way, in grams. Will it smell like beef? answers the question everyone asks second. Grass-fed vs grass-finished covers what the cattle ate and why the fat changes with it, and why is my tallow balm grainy? has the twenty-minute fix for a sandy batch.
Brian is the founder of Craft Tallow, a small-batch tallow skincare line shipped from Cottonwood Heights, Utah, built on 100% grass-fed suet. Questions? Reply to any email from us; it lands with him.