Lavender tallow soap bar

Everything to love about a classic tallow bar, softened with calming lavender. It's a cold-process soap, so it asks for the same care and patience as any lye recipe — but the reward is a creamy, gently scented bar that lingers in the best way.

About 8–10 bars45 minAdvanced — involves lye

Why this works

Tallow gives the bar its creamy lather and long life, while a measured amount of lavender essential oil adds a soft, soothing scent that survives the cure.

What you'll need

2 lb grass-fed tallow (rendered, cosmetic-grade)
9 oz distilled water
4 oz lye (sodium hydroxide) — confirm for your batch with a soap calculator
0.7–1 oz lavender essential oil (added at trace)
Optional: dried culinary lavender buds for the tops
Stick blender, scale, gloves, goggles, long sleeves, a soap mold, a ventilated space

Before you start

Lye (sodium hydroxide) is caustic. Always add lye TO water, never the reverse.
Wear gloves and eye protection and work in a ventilated space away from kids and pets.
Run your exact amounts through a lye/soap calculator before mixing.
Keep essential oils within skin-safe limits for soap, and cure bars fully (4–6 weeks).

How to make it

1
Gear up: gloves, goggles, long sleeves, good ventilation.
2
In a well-ventilated area, add the lye to the water (never water to lye); stir until clear and let it cool to ~100–110°F.
3
Melt the tallow to ~100–110°F so both are within ~10°F of each other.
4
Slowly pour the lye solution into the tallow and blend in short bursts to a light, pudding-like trace.
5
Blend in the lavender essential oil, pour into the mold, scatter buds on top if using, cover, and rest 24 hours.
6
Unmold, cut into bars, and cure on a rack 4–6 weeks before use.

Maker's tips

Add lavender oil at light trace — too early and the scent can fade, too late and it can seize the batch.
Run your exact amounts through a lye/soap calculator every time; don't eyeball it.
Dried buds look beautiful but can brown in the bar — a light scatter on top ages best.

Keeping it fresh

Cure on a well-aired rack for four to six weeks, turning occasionally. Cured bars keep a year or more somewhere cool, dry, and out of direct sun.

Common questions

Will the lavender scent last?: A properly measured lavender essential oil added at trace holds up well through the cure — though all natural scents soften over time.
Can I use dried lavender inside the bar?: A little on top is prettiest. Buds worked all the way through can scratch and may brown, so keep them sparing.
Is this gentle enough for daily use?: Once fully cured, a tallow bar is mild and creamy. As always, patch test and skip it if your skin is reactive to fragrance.

Keep reading

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What you'll need

2 lb grass-fed tallow (rendered, cosmetic-grade)

9 oz distilled water

4 oz lye (sodium hydroxide) — confirm for your batch with a soap calculator

0.7–1 oz lavender essential oil (added at trace)

Optional: dried culinary lavender buds for the tops

Stick blender, scale, gloves, goggles, long sleeves, a soap mold, a ventilated space

Before you start

Lye (sodium hydroxide) is caustic. Always add lye TO water, never the reverse.

Wear gloves and eye protection and work in a ventilated space away from kids and pets.

Run your exact amounts through a lye/soap calculator before mixing.

Keep essential oils within skin-safe limits for soap, and cure bars fully (4–6 weeks).

How to make it

Gear up: gloves, goggles, long sleeves, good ventilation.

In a well-ventilated area, add the lye to the water (never water to lye); stir until clear and let it cool to ~100–110°F.

Melt the tallow to ~100–110°F so both are within ~10°F of each other.

Slowly pour the lye solution into the tallow and blend in short bursts to a light, pudding-like trace.

Blend in the lavender essential oil, pour into the mold, scatter buds on top if using, cover, and rest 24 hours.

Unmold, cut into bars, and cure on a rack 4–6 weeks before use.

Common questions

Will the lavender scent last?

A properly measured lavender essential oil added at trace holds up well through the cure — though all natural scents soften over time.

Can I use dried lavender inside the bar?

A little on top is prettiest. Buds worked all the way through can scratch and may brown, so keep them sparing.

Is this gentle enough for daily use?

Once fully cured, a tallow bar is mild and creamy. As always, patch test and skip it if your skin is reactive to fragrance.