How to Make Bath Bombs – Recipe & Method
This recipe will make about 8-9 bath bombs using our 55mm Bath Bomb Mould
400gm Bicarbonate Soda
200gm Citric Acid
25gm Epsom Salt (optional)
15gm Kaolin Clay
10gm Coconut Milk Powder (optional)
10gm Cream of Tartar
10gm Tapioca Flour
10ml Sweet Almond Oil (or other carrier oils or butters of choice)
5ml Fragrance Oil or 2ml Essential Oil
5ml Polysorbate 20 (Emulsifier)
½ teaspoon Mica Powder or Icing Gel (optional)
Witch Hazel (for spritzing or water)
Weigh and place all dry ingredients into a bowl, ensuring that there are no lumps. It’s advisable to sift all dry ingredients to ensure a nice smooth texture. If using Epsom Salt this can be ground to a finer powder and added to the dried ingredients once ground – this helps to make a smoother finish. Add your colour powder, either mica powder or cake icing gel can be used for this, some people even use food colouring however in our experience, this is not ideal. When the mixture is damp the colours will appear much brighter then they will when dry a little lighter. Rub the colour through the dry mix using the palms of your gloved hands.
Once you’re happy with your dry mixture, go ahead and add in your fragrance oil or essential oil, polysorbate and almond oil. Rub the mixture between the palms of your gloved hands to ensure that each and every grain is coated in the wet ingredients. The mixture should resemble a moist but not wet sand. When squeezed into a ball in your hand, the mix should just hold form. If you feel it’s not wet enough using a spritzer bottle, spray with Witch Hazel or Water until the mixture is forming a ball in your hands when squeezed together.
Now you’re ready to build your bath bombs. Using your mould – overfill and press into your mould until it is packed firmly. If using our aluminium bath bomb moulds, overfill each half and press together to form a nicely packed mould. NOTE – Do not twist the moulds together as the contents will break. Just push them together and wipe away the excess from the seam with your fingers. Lightly tap the mould on the seams with the back of a spoon a few times and gently remove one half of the mould. Then gently tip it over and remove the other side of the mould, carefully placing the bath bomb on a tray to dry. If during the making process you feel as though your mixture has dried out a little, just spritz the mixture with your spray bottle of Witch Hazel or Water and rub through again to distribute.
The bombs will begin to set within an hour, they should not be moved for a couple of hours to ensure they have set. Your bombs will be ready to use in approximately 24 hours.
BATH BOMB TIPS –
Do not over pack your moulds, they’ll be difficult to unmould
Emulsifier is used to distribute the oils and mica powders into the bath water, it also helps minimise residue in the bath
Do not twist the moulds – if using a sphere, just push it together
If you use Coconut Milk Powder, this will give a little bubble power to your finished product and it’s lovely for your skin
We recommend using Tapioca Flour in our Bombs, as it is great for those that suffer with allergies, this can be substituted with Corn Flour if you wish.
Tapioca Flour, Cream of Tartar & Kaolin Clay – will help your Bath Bombs Dry quickly, preventing premature fizz.
Epsom Salt is optional and can be omitted from the recipe for a basic bath bomb
Colour – is optional and can be omitted or substituted with Cosmetic Clay or Herbal Colourants
Fragrance – can be substituted with Essential Oils if you’d like to make a more natural therapeutic bath bomb.
We do not use SLSA (Sodium Lauryl Sulfoacetate) – to make bubbles in our bombs as we’d rather use a more natural alternative such as Coconut Milk Powder or a Natural Liquid Soap to generate bubbles. If you’d like to create more bubbles – try omitting all liquid oils/butters and replacing with Liquid Castile Soap.
There are many different options with Making Bath Bombs, play around and see what you like?
Recipe by Yvonne Cowell 2017