Aug 13,2022
These ingredients are safe to use in the bath,but it’s important to note that bath bombs are inedible. We recommend this craft for children aged eight years or over. 
 
Bath bomb recipe 
 
Makes 4 half-balls 
 
Prep 30 mins,plus 2-4 hrs setting 
 
100g bicarbonate of soda 
 
50g citric acid 
 
25g cornflour 
 
25g Epsom salt(optional) 
 
2 tbsp oil–such as sunflower,coconut or olive oil 
 
¼tsp essential oil,such as orange,lavender or chamomile 
 
a few drops of liquid food colouring 
 
orange peel,lavender or rose petals,to decorate(optional) 
 
You will also need 
 
mixing bowl 
 
whisk 
 
plastic moulds(see below for ideas) 
 
Method 
 
1. Put the bicarbonate of soda,citric acid,cornflour and Epsom salt in a bowl,then whisk until fully combined. 
 
2. Pour the base oil,essential oil and food colouring in a small bowl. Mix together well,combining the oil with the colouring as much as possible. 
 
3. Very slowly add the oil mixture into the dry ingredients a little at a time,whisking between each addition. When all the oil is added,add a few tiny drops of water and whisk again(it will fizz when you add the water,so mix it in quickly). You’re looking for the mixture to slightly clump together when pressed in your hand and keep its shape–it shouldn’t be too wet. 
 
4. If you’re adding peel or flower petals to decorate,drop them into the bottom of your chosen mould. Pack your mixture tightly on top,pressing down and smoothing out the top with a teaspoon. 
 
5. Leave your bath bomb in the mould to dry for 2-4 hrs,then carefully remove it. It’s now ready to drop into the bath–watch it fizz away! 
 
Top tips for making bath bombs 
 
Be sure to use liquid food colouring,not gels. Gels will clump together when you add them to the bicarbonate and it’s hard to mix them in. 
 
Once you’ve added the liquid to the mixture,you need to work quickly to mix everything together and push it into the mould as soon as you can. 
 
To allow your bath bombs to dry,leave them uncovered in a cool,dry place(away from taps and humidity). They will take longer to set in humid weather. 
 
If you’ve got more than one colour,why not make a rainbow bath bomb? Layer up the different colours and they will blend together beautifully.
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