05/29/2026
Educational Soap Series — Post 2
Breaking Down Common Soap Oils & What They Actually Do
One of the biggest differences between handmade soaps is the OILS used in the recipe.
Every oil brings something different to a bar of soap, which is why no two soap recipes are exactly the same! Some oils help create bubbles, some help make a harder bar, and others help create a creamy or conditioning feel.
Here are some of the most common oils and ingredients you may see on handmade soap labels:
Olive Oil
Known for creating a gentle, conditioning soap. Olive oil is often loved in soaps made for sensitive skin because it creates a softer, milder lather.
Coconut Oil
Helps create those big bubbly lathers many people love! Coconut oil is highly cleansing, but when used in large amounts it can feel drying for some skin types.
Tallow
A traditional soap making ingredient that creates a hard, long lasting bar with creamy lather. Tallow is commonly used to help balance cleansing oils like coconut oil.
Sunflower Oil
Lightweight and conditioning. Often added to help support skin feel and balance a recipe.
Sweet Almond Oil
Known for adding a silky, lightweight feel to soap. Many soap makers use it for extra conditioning properties.
Shea Butter
Helps create a rich, luxurious feel in soap and is commonly added for extra moisture and hardness.
Goat Milk
Not an oil — but an important ingredient! Goat milk adds natural sugars that help boost lather and create the creamy feel many people love in goat milk soap.
Another important thing many people don’t realize:
The softer the oils used in a soap recipe, the longer the soap should typically cure.
Soft oils like olive oil create softer bars in the beginning, and they need extra time for water to evaporate and for the bar to become harder and milder over time.
You may hear some people say that a 100% olive oil soap bar (often called Castile soap) is one of the best options for sensitive skin. While many people do love it, a true Castile bar can take close to a YEAR to properly cure before it reaches its best hardness and lather.
That’s why cure time matters just as much as ingredients when it comes to handmade soap quality.
✨ Here’s the important part:
A soap isn’t “good” or “bad” just because it contains one certain ingredient. It’s all about BALANCE in the recipe.
For example:
* Too much coconut oil may feel drying for some people
* Too many soft oils can create a bar that dissolves quickly if not cured long enough
* Different skin types react differently to different recipes
That’s why reading ingredient labels matters so much when choosing handmade soap!
Next post in the series:
What is lye, and why is it required to make real soap?