Bath, Toilet & Shower Bomb Recipe

These little fizzers aren’t really cleaners, they’re fragrance bombs.

When they hit water, they fizz and dissolve, releasing essential oils into the air. That fizzing action comes from a reaction between bicarbonate of soda (alkaline) and citric acid (acidic). The reaction is fun, fast, and temporary.

You can use the same base recipe for different purposes.

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Recipe & Instructions

🫙 Makes: Approx. 12 ice sized bombs 🕝 Time: 1-2 minutes


INGREDIENTS

  • Bicarb Soda: 1 cup
  • Citric Acid: 1/2 cup
  • Essential Oils: 20–30 drops
  • Water/Alcohol/ Witch Hazel/ Glycerine *

* Use what ever you have on hand with the idea to spitz and add teeny amounts at a time to avoid the ingredients reacting.


METHOD

  1. Combine the bicarb nd citric acid in a bowl. Mix well to remove any lumps.
  2. Add essential oils and mix thoroughly.
  3. Lightly spray the mixture with your chosen agent, a little at a time, stirring constantly.
  4. Stop as soon as the mixture just starts to clump when squeezed, do not over-wet.
  5. Press firmly into silicone moulds or scoop into small shapes.
  6. Leave to dry completely for 24 hours.
  7. Store in an airtight container.

Answers to Common Questions

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Important making notes

  • Go slowly with water, too much will trigger fizzing too early
  • Dry air helps these set properly
  • If they crumble, add a tiny bit more moisture next time

If they expand or crack, you added too much water


These do not clean
They release fragrance only. Use proper cleaning products for cleaning or disinfecting.


Shelf life
Stored in an airtight container, they’ll keep for a ouple months. Moisture is their biggest enemy.

Get What You Need

Including a pre-mixed laundry powder, so you can enjoy all the benefits whilst saving your ingredients for other products.

A kraft paper earth bag with simple white label with Under your Sink Logo and description Bicarb- all round Eco-cleaner – mild strength alkali. There is a little wooden bowl with white crystalline Bicarb Soda granules inside. It’s a clean image to show green cleaning. This is a product image for website as this is for sale in various sizes, online with Australia wide delivery.

Bicarb Soda

Citric Acid

Citric Acid

Amber glass essential oil bottle with white label with Under Your Sink logo and description lemon essential oil. Has blurred images of lemon in background

Lemon Essential Oil

small 50ml amber glass essential oil bottle with white label with under your sink logo and description LEMONGRASS pure essential oil

Lemongrass Essential Oil

Amber glass essential oil bottle with white label with Under Your Sink logo and description Eucalyptus Blue Gum essential oil. Has blurred images of eucalyptus in background

Eucalyptus Blue Gum Essential Oil

All the resources, ingredients and tools you need are here on the website!

  • The Recipe Hub

    WHAT TO MAKE
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  • The Learning Hub

    WHY IT WORKS
    Plain-language deep dives into each
    ingredient: what it is, where it comes from, and why it earns its place under your sink.

    Meet the ingredients