How to make Fizzing Halloween Bath Cauldrons

These are a really great surprise for the kids at Halloween, or like me, just for yourself 馃槈

This is the best combination of ingredients that I鈥檝e found to get a lovely balance between skin feel and high foam and fizz.

This recipe includes SLSa which you should wear a respirator for, so if you鈥檇 like to make these with children and are worried about their safety, you may wish to substitute the SLSa for Cornstarch instead. You鈥檒l still get a lovely fizz, just not as much foam.

This is the Formula and Recipe for a 600g Batch and should make around 5-6 cauldrons depending on size. I have linked where I got mine in the description for the video.

Phase A

60% (360g) Bicarbonate of Soda
2.5% (15g) Kaolin Clay
2% (12g) SLSa

Phase B

2.5% (15g) Sweet Almond Oil
1.5% (9g) Halloween Themed Fragrance Oil (I used Toffee Apple)
1% (6g) Polysorbate 80

Phase C

30% (180g) Citric Acid

Phase D

Up to 0.5% (3g) Mica or Pigments (I used Neon Pink, Orange and Green)


路 Put on a respirator and gloves.

路 Add phase A to a bowl and mix with your hands until combined

路 Add phase B to the dry ingredients and mix with your hands until combined. It should resemble wet sand.

路 Add Phase C to the mixture and mix until combined.

路 Divide mixture into bowls to add colour.

路 Using the correct percentage of colour with the allowed amount per bowl, add your colour pigment and mix in with your hands until the colour has dispersed evenly.

路 You can now either use immediately or allow to dry out over night before filling.

路 Fill your cauldrons, compacting slightly as you go.

路 If the mixture is being used immediately then leave to dry in the cauldron overnight.

路 To use, place under a running tap in the bath.


Bicarbonate of Soda has no substitute as this is what gives you the fizz.

SLSa can be omitted if you prefer. It is there to increase bubbles and foam. It can be replaced with cornstarch.

Kaolin Clay can be substituted with arrowroot powder or cornstarch.

Polysorbate 80 has no substitution and is there to prevent the oily residue around your bath.

Sweet Almond Oil can be substituted with any other carrier oil.

Fragrance Oil is your choice, but check IFRA for allowed amount for bath bomb products.

Citric Acid is necessary for the reaction. This is your activator, which is why we leave it until last to avoid the wet phase activating the mixture early.

Colours can be Micas, Neons or pigments. Water soluble pigments can be extremely strong, so experiment with a tiny bit at a time.

Disclaimer: These formulas and recipes are experiments created for the purpose of sharing on Patreon and YouTube. Revega does not make any claims as to their qualifications or the efficacy of the formulations which are listed here for entertainment purposes and accepts no responsibility for how you use these. We are self-taught and offer these videos from our years of knowledge and experience in making our own cosmetic products.

Remember that if you intend to use one of these formulations for your own product range, do your own research, experiments, adjustments and tests before using, gifting or selling.

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