Blueberry Galaxy Bath Bomb

#Makeitmonday- Blueberry Galaxy Bath Bomb

Recipe inspired by Blueberry Blitzkrieg from ‘Fizz Boom Bath!’ by Isabel Bercaw & Caroline Bercaw.

It’s almost back to school time, so we’ve got one last #makeitmonday that the kids can get involved with, this recipe is slightly more advanced than our previous starfish bath bomb.

Get the kids imagination running off into the stars with this galaxy inspired bath bomb, we’ve used blue, pink, purple & gold Mica’s to colour ours, but every galaxy is different, what colour is yours? We’d love to see, tag us on Instagram @thesoapkitchenuk or upload your photos to our facebook page.

What you need:

4 large mixing bowls

Measuring spoons

Accurate weighing scales

3-4 sphere shape moulds


2 ¼ cups (497g) Bicarbonate of Soda

1 ¼ cups (288g) Granular citric acid

¼ cup (24g) cornstarch

Spray bottle of water

1tsp (5ml) blueberry fragrance

½ tsp Ocean Blue Coated Mica Pigment

½ tsp Passion Pink Coated Mica Pigment

½ tsp Amethyst Coated Mica Pigment

2 tsps Gold EcoSparks Mica Based Glitter

Makes 3-4 bath bombs

Step 1: In your first bowl mix together all the dry ingredients: bicarbonate of soda, citric acid and cornstarch. Once combined, add the fragrance & divide the mixture into 2 bowls.

Step 2: Take one bowl with half the mixture in, then separate this into 3 more equal parts. So, you will now have 4 bowls.

Step 3: Now add the mica pigment, use the ocean blue for the largest amount of mixture, then put the pink, then the amethyst into 2 of the smaller bowls, leaving one plain white. Mix each batch separately with your hands (use gloves if you don’t want to get your hands messy!) wash your hands between each batch to ensure no colour mixing happens. Once the ingredients in each bowl have all been well incorporated.

Step 4: Using the spray bottle gentle add water a few squirts at a time mixing together until you get damp sand consistency. Repeat for each bowl.

Step 5: Get your first sphere shaped mould, add a pinch of each of the pink, purple and white mixture, then sprinkle some gold eco-sparks around the perimeter of the colour just added. Repeat this so you now have 2 moulds half filled.

Step 6: Fill both moulds to the top with the blue mixture making a little hill, don’t be shy here make sure there is plenty in the mould, the more mixture, the easier it will compress with the other side.

Step 7: Take both filled moulds and sandwich them together, in one swift confident motion, making your full sphere. Once you are happy with the connection, remove one half of the mould, and use the edge of the plastic to scrape away any excess.

Step 8: Leave to air dry for 24-48hrs. If you need to re-use the moulds you can carefully remove them and leave to dry on a flat surface.

Once dried, watch your sparkly galaxy explode into colour at bath time!

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