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1.5 pounds of soap

Menthol Crystal Cold Process Soap Project

These cold process soaps are scented with menthol crystals. They’re a natural product that can be used in a variety of projects including soap, scrubs, balms, and more.
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Additional Information

  • Description
  • Supplies
  • Instructions
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Bramble Berry menthol crystals are created with a cold extraction method. Essentially, oil is extracted from mint leaves and then frozen. The resulting crystals can be melted with oil or alcohol and added to recipes at 0.5-2%.

This recipe uses 1% menthol crystals. It’s enough to give the bars a very light scent and a cooling sensation on sensitive areas of skin. You can increase or decrease the amount depending on your personal preference.

We left these bars uncolored and added poppy seeds for exfoliation. The 10% water discount helps the soap release from the mold faster. A discount does cause acceleration, but that works well for this simple design.

  • Skill Level: Beginner

  • Time to Complete: 2 hours

  • Kit Yields: 1.5 pounds of soap


4 Ingredients
1 Tools
1 Items From Home
For All 5 Items
For All 5 Items
4 Ingredients
4 Items
We do our best to include just what you need to make your project, however due to available product sizes, you may have left overs.
Lots of Lather Quick Mix - 33 oz
Lots of Lather Quick Mix - 33 oz
Varient/Quantity/Set: 0
variant-quantity-set: 33 oz
Price Each: $12.99 Now: $11.69

Menthol Crystals - 1 oz
Menthol Crystals - 1 oz
Varient/Quantity/Set: 0
size: 1 oz
Price: $3.99

Sodium Hydroxide Lye
Sodium Hydroxide Lye
Varient/Quantity/Set: 0
variant-quantity-set: 1 - 32 oz jar
Price: $10.99

Poppy Seeds - 3 oz
Poppy Seeds - 3 oz
Varient/Quantity/Set: 0
size: 3 oz
Price: $4.50

1 Tools
1 Items
6 Cavity Silicone Circle Mold - 1 Mold
6 Cavity Silicone Circle Mold - 1 Mold
Varient/Quantity/Set: 0
variant-quantity-set: 1
Price: $16.49

4.8 oz. distilled water



Menthol Crystal Cold Process Soap Project
This recipe uses 1% menthol crystals. It’s enough to give the bars a very light scent and a cooling sensation on the skin.


6 Cavity Silicone Circle Mold
16 oz. Lots of Lather Quick Mix
0.2 oz. Menthol Crystals
2.3 oz. Sodium Hydroxide Lye
4.8 oz. Distilled Water (10% water discount)
1 tsp. Poppy Seeds


SAFETY FIRST: Suit up for safe handling practices. That means goggles, gloves, and long sleeves. Make sure kids, pets, other distractions, and tripping hazards are out of the house or don’t have access to your soaping space. Always soap in a well-ventilated area.


Slowly and carefully add 2.3 ounces of lye to 4.8 ounces of distilled water. Gently stir until the lye has fully dissolved. Set it aside to cool. If you’d like a harder bar of soap that releases faster from the mold, you can add sodium lactate to the cooled lye water. Use 1 teaspoon of sodium lactate per pound of oils in the recipe. For this recipe, you’d add 1 teaspoon sodium lactate.


Fully melt the entire bag of Lots of Lather until it’s completely clear. Shake the bag to mix all the oils. Measure 16 ounces of the Quick Mix into a heat-safe bowl. Add 0.2 ounces of menthol crystals. Stir the oils to help the menthol crystals melt – this may take a few minutes. Continue stirring until you no longer see any crystals. Note: If the crystals aren’t dissolving, the oil may not be hot enough. They melt around 120° F and hotter. Place the bowl in the microwave and heat using 20 second bursts and continue to stir. 

menthol crystals in oil

stir in menthol crystals



Once the lye water and the oils have cooled to 130° F or below (and are ideally within 10 degrees of each other), add the lye water to the oils and stick blend the mixture to a thin to medium trace.

blend together


Add 1 teaspoon of poppy seeds and use a whisk or spatula to fully mix them in.

add poppy seeds

stir in poppy seeds


Place the mold on a cutting board for easy pickup. Pour the soap into each cavity. If the soap starts to get thick, use a whisk to stir and loosen up the batter. Tap the mold on the counter to get rid of bubbles. If you’d like, use a large spoon to smooth the top.

pour into mold


Allow the soap to harden in the mold for 1-3 days (depending on if you used sodium lactate or not). Unmold each soap and allow the soaps to cure for 4-6 weeks before use. Enjoy.

unmold soap

final project

Tutorial credits

Photographer: Amanda Kerzman




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