Passionfruit Papaya Molten Lava Cold Processed Soap
  • Difficulty Intermediate
  • Time 1 - 2 hours
  • Yields 10 - 14 bars


Molten Lava Cold Process Soap Tutorial


This is a fun soap when you want to get a bit creative and see what you have made as you slice the soap loaf! A combination of liquid Melt and Pour Soap which is poured whilst still liquid into medium traced Cold Process Soap layers creates this interesting effect. You could of course make an arctic themed loaf, but warm summer colours were the feel I was going for.

*Note:  This loaf was originally made with Passionfruit Papaya Fragrance.  As this has been deleted, we have subsituted with Pineapple Papaya Fragrance. 

I used both our Regular Silicone Loaf Mould and our Small Silicone Loaf Mould for this quantity of soap.  Alteratively you can make one larger loaf using Silicone Lined Loaf Mould or Regular Silicone Loaf Mould



For how to make soap from Scratch, please see our Cold Process Soapmaking Instructions Page
If you are a beginner, we recommend you make a few batches before attempting this soap as it can be a little overwhelming following so many steps when making your first soap.

  • Weigh all ingredients and have the moulds ready to go

 Passionfruit Papaya Molten Lava Cold Process Soap


  • Prepare the Lye Water and leave in a well ventilated area to cool whilst you prepare everything else

  • Melt the oils for the Cold Process Soap

  • Place the Clear Melt & Pour Soap into two jugs

  • Melt the Melt & Pour Soap on medium low in the microwave, heat to approximately 60°C

  • Now add colour to each jug and approximately 1 teaspoon of the measured fragrance and set aside.

    I used 10 drops of Citrus Orange Liquid Lake for the orange, and 5 drops Watermelon Red Liquid Lake with a touch of Carmine (which is optional)

  • Bring the cold process soap to thin trace, mix through the rest of the fragrance and bring to medium trace

  • Now pour a layer of cold processed soap approximately 1 - 2 cm deep in the base of the loaf mould, and pull it into a textured surface (so you have little mountains and valleys of soap)

  • Check the Melt & Pour Soap is still liquid (if it's setting up, give it a quick blast in the microwave) and pour a thin layer using approximately half the soap in each of the jugs

  • Pour the melt and pour soap in different areas so you have a nice spread of the two colours throughout the soap


 Passionfruit Papaya Molten Lava Cold Process Soap

  • Next pour another layer of cold process soap approximately 2cm deep over the melt and pour soap

 Passionfruit Papaya Molten Lava Cold Process Soap

  • Now repeat another splodgy layer of liquid melt and pour soap, using the rest of the melt and pour soap

  • You can leave the soap "as is", or if you want to you can use a chop stick to give it a little swirl under the surface

 Passionfruit Papaya Molten Lava Cold Process Soap

  • Finish by filling the mould with the rest of the cold process soap

  • Make the pattern on top of the soap you would like, so it has a nice texture, and then sprinkle with Rainbow Holographic Glitter

  • Spritz with Isopropyl Alcohol to keep the ash at bay

 Passionfruit Papaya Molten Lava Cold Process Soap

  • Now put your soap to bed (I used extra insulation of hot packs as it was a cold winter day when I made this batch)

 Passionfruit Papaya Molten Lava Cold Process Soap

  • Unmould the soap the next day, and slice the loaves to reveal your own unique lava design inside your soap!