
Our DIY Bath and Beauty category is one of the most popular on this site. We have an entire collection of simple recipes that are perfect for the beginner. Browse our curated Amazon list to shop for many of the supplies that we use in our products.
These diy unicorn bath bombs make a great party favor for unicorn parties. You can make these easily by following the step by step tutorial below and you may choose to make these with or without fragrance.

How do you make bath bombs?
Bath bombs are very easy to make, and you will learn just how easy by following my tutorial below. You will need baking soda, Epsom salt, corn starch, and citric acid, along with a few other ingredients to make your own bath bombs.
How long do homemade bath bombs last?
Your homemade bath bombs should last around six months. After that time the citric acid will lose its potency, so the bath bombs won’t be as effective, or as fizzy.
Do you put bath bombs in before or after?
You should fill the tub with water, then add the bath bomb. This will allow your bath bomb to disolve into the water properly.

There’s really nothing to making bath bombs. One you get the hang of it, you can make a batch rather quickly. You can also make multiple batches at once by doubling or tripling the dry ingredients, then separting the mixture into separate bowls, and adding different colors or scents. Here are some other bath bombs that I’ve made, which you might enjoy.
- Eucalyptus & Lavender Bath Bombs Recipe
- Sweet Orange Essential Oil Bath Bombs
- Rose Petal Bath Bombs
- Bath Bombs with Sprinkles
- DIY Hazelnut Coffee Bath Bombs

What do I need to make DIY unicorn bath bombs?
These are the supplies that you will need to make your own diy unicorn bath bombs. I’ve shared Amazon shopping suggestions for some of the items that may be tougher to find.
- Epsom salt
- baking soda
- corn starch
- citric acid
- olive oil
- water
- Bath Bomb Soap Dye
- Large bowl
- Whisk
- 5-6 small size (1.8 inch) round bath bomb molds
- Small jar with lid
- Measuring cups
- Measuring spoons


DIY Unicorn Bath Bombs

Materials
- 2 oz Epsom salt
- 4 oz baking soda
- 2 oz corn starch
- 2 oz citric acid
- 1 tbsp olive oil
- ½ tbsp water
- mica powder
Tools
- Large bowl
- 4 smaller bowls
- Whisk
- 5-6 small round bath bomb molds
- Small jar with lid
- Measuring cups
- Measuring spoons
Instructions
- In a large bowl, combine your dry ingredients - Epsom salt, baking soda, cornstarch and citric acid. Mix very well with a whisk, for about 2-3 minutes.
- In a small jar with lid, add the olive oil and water. Place the lid on the jar and shake very well, until all of the wet ingredients are completely mixed together.
- Add the liquid mixture to the dry mixture very slowly. It is important to add just a few drops at a time, while continuously whisking the mixture. The mixture may start to fizz if you do not so this step slowly enough, while mixing it in right away. This will cause the bath bombs to expand in the mold and not form right.
- Divide your mixture evenly into 4 smaller bowls
- Add about 1/4 teaspoon of mica powder to each bowl, using different colors. I used yellow, blue, green and pink for these bath bombs.
- Fill each of the molds with the bath bomb mixture, alternating colors often to get the unicorn effect.
- Firmly stuff each side full.
- Secure both parts of the mold together, give a quick twist to get any excess mixture out, and let set for about 24 hours. This gives the bath bomb plenty of time to form.
- To release, twist one half of bath bomb mold. If it’s not releasing well, grab a spoon and lightly tap one half of bath bomb mold. This should do the trick. Repeat with the other half to fully release bath bomb.