Bubble bars – ingredients & equipment

There are a few ingredients you will need to buy in order to complete your course. The course booklet details everything you need and also has a list of suppliers.

Below are links to some of the ingredients on Amazon, however please note you can source ingredients in many places if you have the time to hunt around.

Check your course booklet to work out the total amount of each ingredient you need to complete the course. If you have a friend who is completing the course, we would suggest buying together to minimise any wastage.

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Bicarbonate of Soda

This is the largest ingredient by weight in bubble bars. Even if you decide to never make a bubble bar again, you can use it for cleaning or cooking! You will need food grade quality.

Don’t forget to work out the total you need for the whole course – check your course book as there are different size recipes.

If you are doing the course with a friend – buy. in bulk together as it usually works out cheaper

Castor Oil

Castor oil can be bought from  many places. All will be food grade so you just need to work out which recipes you are using and how much to buy. 

We have only included a link to The Soapery’s Castor Oil as it is is fantastic value for money. If you find it is out of stock, other brands will be fine.


SLSA is a key ingredient in bubble bars. There have been European shortages in 2021 – but it is now tarting to become available. It is the most expensive of the ingredients – but you can use it to make bath bombs as well. We use cosmetic wholesalers and are currently buying ours from Soaposh. You can also try other wholesalers such as The Soap Kitchen. 


Glycerin can also be bought in chemists or pharmacies. You don’t need much of this at all, so buy a small amount!

Cocamidopropyl Betaine

Cocamidopropyl Betaine is also available form wholesalers – so if you are buying SLSA from somewhere like Soaposh or The Soap Kitchen, then you might find it is cheaper to buy this from them too. If not, it is available on Amazon.

Cream of Tartar

Cream of Tartar can be bought in supermarkets, or at food wholesalers, but unless they sell it in large quantities, it is not always cost efficient.

Moulds and cutters

Before you buy anything specifically for making bubble bars – have a think about what you might already have. You will need to choose one type of mould or cutter, so there is no need to buy lots. The course covers using moulds, cookie cutters, moon dough cookie press or an ice cream scoop. Think about what you want to create, then see if you have anything you can use at home. We have included a selection, but have not tried all of these. Please also check delivery times – we have included immediate dispatch only.