How To Make Eco Soap From Used Cooking Oil # Handmade Gift – Green Yards

How To Make Eco Soap From Used Cooking Oil # Handmade Gift

Handmade Eco Soap made from used cooking oil
Handmade Eco Soap made from used cooking oil.

Any handmade gift will make one’s day, especially your loved one. Handmade soap is not only a thoughtful gift, most importantly the process of making is fun!  Here’s a guide to begin your soap-making journey. Moreover, it’s an Eco-friendly path.


Stainless steel pot, cup & ladle

Apron & gloves


Digital scale



500g used cooking oil

70g lye (sodium hydroxide)

165g water

10g vinegar (to remove odour) *optional

Scent oil (act as fragrance) *optional


1. Weight 165g of water into stainless steel cup.

2. Weight 70g of Lye and insert carefully into water weighted. Let it cool down to 45°C. (Be cautious that the temperature of water may increase drastically during this steps. Handle a lye with a protective gloves and eye mask is a must. Stir in a well ventilated place.)

3. Filter the oil using sieve and weight 500g of used cooking oil into another stainless steel pot and heat it to 45°C.

4. Carefully pour the lye solution into the oil and stir with a regular pace until “tracing” occur.

Mixture leaves a trace of “Z” behind.

5. Add vinegar or scent oil if desired.

6. Pour it into the mold (any recycled mold such as yogurts cup or milk containers is also applicable).

7. Remove the soap from the mold carefully using gloves after 2 days and let it air dry.

8. The soaps are ready to use after 5 weeks.

9. Kudos! Take a photo and share with us on Facebook at

12 thoughts on “How To Make Eco Soap From Used Cooking Oil # Handmade Gift

  1. Stella says:

    I have recently started using used oils for making my soap. This is not only cheap for my family, it’s also good on the environment as many restaurants find it very expensive to dispose of the oil.

    I have also been looking for a way of reducing odour due to different types of foods fried in the oil.
    Fragrance oils are cheap either! So I was so happy when I came across your article recommending the use of vinegar to reduce the smell of the oil.

    I will definitely try this. Thank you very much

  2. jiha says:

    hello, just want to ask….
    If I want to add on coffee ground in this soap, is there any adjustment needed for other ingredient composition?

    • admin says:

      Hi Jiha,

      No adjustment is needed. You can just add in coffee ground /other flower etc as you like. Please limit it at 1%-2% max.
      Thank you.

  3. Thira says:

    can i replace the vinegar with coffee ground to reduce the odour(if yes, how many ground soap should i used?)? then i add green tea fragrance in saop.

  4. Zita says:

    Hi. Im so happy ti fund your website. In this soap for multupurpose use. Can you elaborate on the use. Thank you

  5. Silpa says:

    Can any type of be used for this? Refined or mixed or anything? Because the regular oils need some proportions to get it right and hence asking. Thanks in advance.

    I haven’t made any soap as yet.

  6. Amara Ezeamama says:

    Thank you for this helpful blog. I am eager to recycle used cooking oil gotten from restaurant for soap. I was surprised (and frankly disappointed) that in most videos where soap is made with used cooking oil, people used the resulting soap for other than bathing. From the look of your finished soap, it seems you are making this for bath use as well. Is my understanding correct? Second question: is there any reason your used oil was the only oil used in the soap? Why is a combination of oils not used in addition to the used oil? I am a new soaper and thought the combination of oils is important. Finally, thank you for noting how to deodorize using vineager.

  7. Sivasangari Ramasamy says:

    The recipe turn out very well. I made soap out of 1/2 kg of used oil. My dishes and rugs are very clean after wash with the soap I made. Tq

  8. Julia Rose G. Dela Ysla says:

    Hi! Can you tell me what ingredient I can use to make it antibacterial soap? I will use it as my research and I will surely credit your idea for this. Thank you so much

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