This is my first Castile soap. Castile = pure olive oil soap. I’ve heard that it’s a luxurious and gentle bar of soap, after it cures for 6-8 months. Castile soap recipes are different than regular CP soap recipes. First, you must apply a water discount (Yikes, that means the concentration of lye is much higher – in the neighborhood of 40%). Second, you mix the EO with your base oil before adding lye. Third, the cure time is 3-4 times longer.
This recipe is for five pounds of soap.
*All measurements are weight measurements, not liquid measurements.
- 56 oz Olive Oil
- 17 oz water
- 7.4 oz lye (Sodium Hydroxide)
- 1 oz Lemon EO
- 1.5 oz Orange EO
Base Oil Composition:
- 100% Olive Oil
Make sure you follow all the general safety precautions for making soap before you start.
- In a heat-safe container, add lye to your water, stir, set aside to cool. Be very careful not to spill, as this is a highly concentrated solution of lye. Keep some white vinegar nearby for an emergency neutralization.
- When the lye solution is close to 110F, set up a double boiler. Gently heat the olive oil to about 100F.
- Combine the EO and olive oil. Carefully pour the lye water into the oils. Gently stir with a heat safe rod.
- Pulse the stick blender in the mixture a few times, and then gently blend until you reach trace.
- Pour in the mold, and wait 1-2 days before cutting.
- Cure for 6-8 months.